Nidek Medical RT-3100 User manual

REFRACTOR
REFRACTOR
RT-3100
RT-3100
OPERATOR’S MANUAL
OPERATOR’S MANUAL

NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan
(Manufacturer) Telephone: [phone]
Facsimile: [phone]
NIDEK CO., LTD : 3F Sumitomo Fudosan Hongo Bldg., 3-22-5, Hongo,
(Tokyo Office) Bunkyo-Ku, Tokyo 113-0033, Japan
Telephone: [phone]
Facsimile: [phone]
NIDEK INCORPORATED : 47651 Westinghouse Drive, Fremont, California 94539, U. S. A.
(United States Agent) Telephone: [phone]
Facsimile: [phone]
NIDEK S.A. : Europarc 13, rue Auguste Perret, 94042 Créteil, France
(EU Authorized Representative) Telephone: [phone]
Facsimile: [phone]
August 2012
34090-P902E
Printed in Japan
Original instructions

I
Use this device properly and safely.
Safety precautions
BEFORE USE, READ THIS MANUAL.
This operator’s manual includes operating procedures, safety precautions, and
specifications for the NIDEK REFRACTOR RT-3100 when it is used in combination with
any of the NIDEK chart presenting devices*1. The dioptric powers are indicated with a
reference wavelength of 546.07 nm.
The safety cautions and operating procedures must be thoroughly understood before
using the device.
Keep this manual handy for verification.
If you encounter any problems or have questions about the device, please contact NIDEK
or your authorized distributor.
*1 Connectable chart presenting devices
• Space saving chart SSC-300, SSC-330, SSC-350, SSC-370
• Chart projector CP-670, CP-690, CP-770
• System chart SC-1700 Pola, SC-2000, SC-1600, SC-1600 Pola
*2 For simplicity, examples of chart type used in this manual are for the CP-770M only.
These examples are applicable to any other type unless specified otherwise.
*3 This manual indicates the visual acuity by fractions (feet). Refer to “7.2 VA Conversion
Table” (Page 121) for visual acuity represented by decimals (meters).
In this manual, signal words are used to designate the degree or level of safety alerting. The defini-
tions are as follows.
WARNING •Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION •Indicates a potentially hazardous situation which, if not avoided, might result in
minor or moderate injury or property damage.
Even situations indicated by CAUTION might result in serious injury under certain conditions.
Safety precautions must be strictly followed at all times.

II
Usage precautions
Before Use
WARNING
•Be sure to secure the refractor head to the refractor arm.
If the refractor head is dropped or falls, injury or device failure may result.
•Connect the power plug to a grounded outlet.
Electric shock or fire may result in the event of malfunction or power leakage.
•Do not modify or touch the device. Do not touch anything inside the device.
This may result in electric shock or malfunction.
CAUTION
•The safety precautions and operating procedures must be thoroughly
understood before using the device.
Unintended use may cause unexpected malfunction or adverse experience.
•Do not store the device in an area that is exposed to rain or water, or
contains poisonous gas or liquid.
•Do not store the device in dusty, hot, humid places or in direct sunlight.
•When connections between units are removed for moving the device, and
necessary to reconnect the units, contact NIDEK or your authorized
distributor.
•Do not carry the device with the power cable and communication cable
connected.
If the device falls, injury or device failure may result.
•Install the device on a stable and level surface.
If the device falls, injury or device failure may result.
•Never install the device in a place where it is exposed to water.
Contact with liquids may cause electric shock or device failure.
•Install the device in an environment that meets the following conditions.
The following conditions must be maintained during use.
Temperature: 10 to 35ºC (50 to 95ºF)
Humidity: 30 to 85% (No condensation)
Pressure: 800 to 1060 hPa
Installation place: Interior
No hazardous dust or smoke
A dust-free place
A place with little external light
A place free from vibration and shock
•Be sure to level the refractor head before use.
Failure to do so could affect the data accuracy. Level the refractor head by turning the
leveling adjustment knob until the bubble is centered in the level.

III
•Be sure to use a wall outlet which meets the power specification
requirements.
If the line voltage is too high or too low, the device may not operate properly. Malfunc-
tion or fire may result.
•Do not overload the electrical outlet.
Fire may result.
•Fully insert the power plug into the outlet.
Imperfect connection may cause fire.
•Never use a power strip or extension cable to supply the device with power.
The electrical safety may be lowered.
•Do not use any power cord other than that equipped. Do not use the
equipped power cord for purpose other than as intended.
Malfunction or fire may result.
•Install the device in area where the outlet that the power plug is inserted
into is easily accessible during use. In addition, ensure that the power cord
can be disconnected without the use of a tool.
Otherwise, it may interfere with disconnecting of the power from the input power
source in case of abnormality.
•Do not place heavy objects on the power cord.
A damaged power cord may cause fire or electric shock.
•This device has been tested and found to comply with the limits for medical
devices according to IEC 60601-1-2: 2007.
These limits are designed to provide reasonable protection against harmful
interference in a standard medical installation.
This device generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause
harmful interference to other devices in the vicinity.
However, there is no guarantee that interference will not occur in a
particular installation. If this device does cause harmful interference to
other devices, which can be determined by turning the device off and on,
the user is encouraged to try to correct the interference by one or more of
the following measures:
Reorient or relocate the receiving device.
Increase the separation between the devices.
Connect the device to an outlet on a circuit different from that to which the other
device(s) are connected.
Consult the manufacturer or field service technician for help.
•The International Electrotechnical Commission sets the essential
requirements for electrical and electronic equipment that may disturb, or be
disturbed by, other equipment. The RT-3100 complies with these
requirements as tabled on Pages 123 to 126. Follow the guidance in the
tables for use of the device in an electromagnetic environment.

IV
During Use
WARNING
•When moving the refractor head, make sure that there are no obstacles in
its path.
If the arm is swung carelessly, it may bump against someone or something and injury
or malfunction may occur.
CAUTION
•When installing and operating the device, observe the following
instructions about EMC (electromagnetic compatibility):
- Do not use the device simultaneously with other electronic equipment to avoid elec-
tromagnetic interference with the operation of the device.
- Do not use the device near, on, or under other electronic equipment to avoid elec-
tromagnetic interference with the operation of the device.
- Do not use the device in the same room with other equipment such as life-support
equipment, other equipment that has major affects on the life of the patient and
results of treatment, or other measurement or treatment equipment that involves
small electric current.
- Do not use the device simultaneously with portable and mobile radio frequency
communication systems because it may have an adverse effect on operation of the
device.
- Do not use cables and accessories that are not specified for the device because
that may increase the emission of electromagnetic waves from the device or the
system and decrease the immunity of the device to electromagnetic disturbance.
•Unplug the power cord and contact NIDEK or your authorized distributor if
the internal wires are exposed, the table turns on or off when the power
cord is moved, or the cord and/or plug are too hot to hold.
This may result in electric shock or fire.
•Keep the measuring windows free of fingerprints and smudges.
Failure to do so could affect the data accuracy.
•In the event of smoke or strange odors, immediately turn off the device and
disconnect the power plug from the outlet. After you are positive that the
smoke has stopped, contact NIDEK or your authorized distributor.
Continued use of the device under such abnormal conditions may cause fire or elec-
tric shock.
•When the device is not in use, turn it off and put the dust cover over it.
If the device is not covered for an extended period, the accumulation of dust may
affect the data accuracy.
•Do not touch the touch-screen panel with anything other than the tip of a
touch-screen pen.
Contact with a hard or sharp object such as a ball point pen may scratch the panel.
In addition, although the tip of a touch-screen pen is covered with resin which is
unlikely to scratch the panel, the panel may be scratched by strongly pressing the pen
against the panel.
Do not touch the panel with fingers. Doing so could decrease the panel sensitivity or
make the panel dirty. It may affect the near vision test accuracy.

V
•Perform the visual and operation checks before using the device. If any
abnormality is found, do not use the device.
Continued use of the device under such abnormal conditions may affect the data
accuracy. Unexpected malfunction or faulty diagnosis may induce unexpected health
hazards.
•Before each patient, always clean the patient's contact area (forehead rest
and face shields) using disinfectant alcohol.
•If the device fails, disconnect the power cord from the power outlet, then
contact NIDEK or your authorized distributor without touching the interior
of the device.
•Take care not to catch hands or fingers in moving parts.
•When connecting interface devices to the device, confirm the symbols, then
connect them securely without applying unnecessarily great force.
Terminals or cables may become damaged.
•Be sure to use only the printer paper (80620-00001) specified by NIDEK.
Other printer papers may cause improper printing and make the data unreadable.
•Do not apply adhesive tape to the printed paper.
Printed characters may fade.

VI
{Patient environment
The patient environment is the volume of space in which contact can occur between the patient and
any part of the device (including connected devices) or between the patient and any other person(s)
touching the device (including connected devices).
Use devices that comply with IEC60601-1 in the patient environment. If any device that does not com-
ply with IEC 60601-1 is to be used, use an isolating transformer or common protective grounding.
Radius of 1.5 m
1.5 m 1.5 m
2.5 m
[Example of patient environment]

VII
After Use
CAUTION
•If the device will not be used for the extended period, disconnect the power
cable from the wall outlet.
Settled dust may collect moisture, and short circuit or fire may result.
•Occasionally clean the prongs of the power plug with a dry cloth.
If dust settles between the prongs, it may collect moisture, and short circuit or fire may
result.
•Do not yank the power cord to disconnect it from an outlet.
This can damage the metal core of the cord and may result in electric shock, short cir-
cuit or fire.
•Before carrying the device to another location, disconnect all the cords and
cables.
Maintenance
CAUTION
•Only NIDEK service representatives or hospital personnel trained by NIDEK
should attempt to modify or touch the inside of the device and/or upgrade
the software.
NIDEK is not responsible for any accidents resulted from improper servicing.
•When performing maintenance work, secure sufficient maintenance space.
Maintenance work in an insufficient space may result in injury.
•When the device is sent back to NIDEK for repair or maintenance, wipe the
surfaces (especially, the area where patients contact) of the device with a
clean cloth dampened with ethyl alcohol for disinfection.
•Never use organic solvents such as a paint thinner to clean the exterior of
the device.
It may ruin the surface of the device.
•When cleaning the measuring window, be sure to remove any dust with a
blower brush and wipe lightly with a soft cloth.
Wiping the window without removing dust may scratch the lens coating and impair
measurement of the power or visual acuity.
•The manager of this device must perform maintenance and check every six
month.
For details of the maintenance and check, contact NIDEK.
When the maintenance check cannot be performed oneself, NIDEK can accept the
maintenance check.
•A pixel may be occasionally missing on the screen or a red, blue,or green pixel point may
always be displayed.
This does not represent a failure of the touch-screen panel; This is due to the manufacturing pro-
cess of the liquid crystal display.

VIII
Disposal
CAUTION
•Follow the local ordinances and recycling regulations regarding disposal
or recycling of the components. The device contains the circuit board with
a lithium battery mounted. Because the disposal method of lithium
batteries varies according to the local government, follow the local
governing ordinates and recycling plans when disposing of the circuit
board with the lithium battery.
It is recommended to commission the disposal to a designated industrial waste dis-
posal contractor. Inappropriate disposal may contaminate the environment.
•When disposing of packing materials, sort them by material and follow
local ordinances and recycling regulations.
Inappropriate disposal may contaminate the environment.

Table of Contents
IX
1. BEFORE USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Outline of Refractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.2 Intended Use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.3 Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.3.1 Refractor head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
1.3.2 Control box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.3.3 Relay box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1.3.4 Connecting each unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
1.4 Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
1.5 Before First Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
1.6 Getting Started and Exiting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
1.6.1 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
1.6.2 Restoring from power saving mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
1.6.3 Exiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
2. OPERATING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . 21
2.1 Operation Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
2.2 Entering Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
2.2.1 Manual data entry with dial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
2.2.2 From Eye Care card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
2.3 Setting Prism Lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2.3.1 Displaying prism values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2.3.2 Switching between rectangular and polar coordinates . . . . . . . . . . . . . . . . . . . . . .24
2.3.3 Rectangular coordinates (XY). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
2.3.4 Polar coordinates (rq) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.3.5 Removing rotary prism lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.3.6 Prism data clear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
2.4 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
2.5 Standard Program Refraction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
2.5.1 Program A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
2.6 Chart Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.6.1 Chart selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.6.2 Visual acuity chart mask functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
2.6.3 Chart lamp, Near point lamp ON/OFF, and SSC chart position adjustment . . . . . .37
2.6.4 Low illumination, glare lamp, and contrast functions (SSC series) . . . . . . . . . . . . .38
2.6.5 Contrast function, Night mode, and Reverse function (SC series) . . . . . . . . . . . . .40
2.7 Link Off Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
2.8 Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

:
X
3. ADVANCED FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.1 Data List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
3.2 Setting Auxiliary Lenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3.3 Specifying Sub Window Display Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3.4 Changing ID No. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3.5 Calling up most recent data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
3.6 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
3.6.1 Clearing programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
3.6.2 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
3.6.3 Operating programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.6.4 Importing or exporting programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
3.7 Setting Time and Date. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3.8 Touch-screen Panel Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
3.9 Parameter Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
3.9.1 Importing or exporting parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
3.10 Exporting Data to Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3.10.1 Displaying Images (SC series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4. TEST METHOD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.1 Unaided Visual Acuity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
4.2 Aided Visual Acuity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
4.3 Astigmatism Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.3.1 Astigmatism test with astigmatism clock dial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.3.2 Astigmatism test with cross cylinder lens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4.3.3 Astigmatism power test with cross cylinder lens
(the hold and remove cross cylinder testing method). . . . . . . . . . . . . . . . . . . . . . . 71
4.4 Spherical Refinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.4.1 Red-green test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.4.2 Cross grid test for far vision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
4.5 Binocular Visual Function Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.5.1 Binocular balance test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4.5.2 Binocular red-green test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
4.5.3 Phoria test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
4.5.4 Phoria with fixation test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
4.5.5 Mallet test (horizontal phoria) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
4.5.6 Mallet test (vertical phoria) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
4.5.7 Von Graefe test (horizontal phoria) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
4.5.8 Von Graefe test (vertical phoria). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.5.9 Maddox test (horizontal phoria) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
4.5.10 Maddox test (vertical phoria) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
4.5.11 Vertical coincidence test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

XI
:
4.5.12 Horizontal coincidence test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
4.5.13 Schober test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
4.5.14 Stereo test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
4.5.15 Worth test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
4.5.16 Pointer test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
4.5.17 Double pointer test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
5. MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
5.1 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
5.2 Cleaning Forehead Rest. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
5.3 Cleaning Face Shields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
5.4 Replacing Printer Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
5.5 Cleaning Printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
5.6 Cleaning Measuring Windows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
5.7 Cleaning Exterior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
5.8 Setting CF Card (Compact Flash Card) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
5.9 Cleaning Eye Care Card Reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
5.10 List of Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
6. SPECIFICATIONS AND ACCESSORIES . . . . . . . . . . . 115
6.1 Classifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
6.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
6.3 Standard Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
6.3.1 Standard accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
6.3.2 Optional accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
7. APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
7.1 Linkage between Charts and Auxiliary Lenses . . . . . . . . . . . . . . . . . . . . . . . . . 119
7.2 VA Conversion Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
7.3 Standard Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
8. EMC (ELECTROMAGNETIC COMPATIBILITY) . . . . . . 123
9. INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

:
XII

1
1
1. BEFORE USE
1.1 Outline of Refractor
The NIDEK REFRACTOR Model RT-3100 is a computerized refractor used for subjective refraction
with the NIDEK AUTO REFRACTOMETER (AR), AUTO REF/KERATOMETER (ARK), AUTO REF/
KER/TONOMETER (RKT), or AUTO LENSMETER (LM) via Eye Care card.
The RT-3100 includes a refractor head, control box, and relay box.
The relay box not only connects the other two units, but also connects the Chart Presenting device or
PC. The control box includes the key panel, display, and printer. The display is a touch-screen panel.
The control box displays the data and can be used for almost all operations. In addition, the control
box operates the refractor head and the connected chart presenting device. It allows the refractor and
charts to be controlled together.
Normally, the relay box is installed on the system table (not included in the RT-3100 package.)
1.2 Intended Use
This instrument provides a means for positioning spherical and cylindrical lenses, prisms and other
optical devices in front of a subject's eyes for the purpose of determining refractive error and binocular
functions.
* In this operator's manual, the keys on the control box are indicated by key representations such as
or . The touch keys on the touch panel other than chart keys are indicated by brackets
such as [Subj.].
The touch panel chart keys are indicated by key representations such as .

2
BEFORE USE: Configuration
1.3 Configuration
1.3.1 Refractor head
4. Forehead rest knob
3. VD check window
2. Near point lamp
1. Measuring window
7. Near point rod
Operator’s side
5. Level
8. Level adjustment
6. Near point card
Patient’s side
1. Measuring windows
9. Forehead rest
10. Face shield
knob

3
BEFORE USE: Configuration
1
1. Measuring windows
The patient looks at any chart through these windows.
2. Near point lamp
Illuminates the near point card.
Pressing the left side key displays the chart control screen. Pressing on the screen turns the lamp on or off.
3. VD check window
Used to check the patient's VD (vertex distance = distance from the corneal apex to the lens).
The windows have calibration marks of 12, 13.75, 16, 18, and 20 mm.
4. Forehead rest knob
Moves the forehead rest forward and backward in order to adjust the VD.
5. Level
Used to confirm that the refractor head is level.
Turn the level adjustment knob until the air bubble is centered in the level.
6. Near point card
Used for near vision testing such as addition powers.
When the chart is shifted slightly to the left, the chart
explanation is revealed.
For the chart on the near point card, see "7.3 Standard Programs" (Page 122).
7. Near point rod
The distance from the patient's eye to the near point card is
marked in inches and centimeters.
• Align the black line at the near point card holder with the desired
distance scale.
• The number in red represents the power (diopter) corresponding to
each distance in meters.
• Rotating the rod 180 degrees and inverting it up side down
changes the scale from between centimeters and inches. See "1.6
Getting Started and Exiting" (Page 20).
8. Level adjustment knob
Adjusts the level of the refractor head.
The refractor head is tilted to a maximum of 2.5º to the left or right.
• When switching the near point chart, do not rotate the near point chart while pressing the
chart window frame.
The near point chart may be rubbed off and become difficult to be seen.
Chart number
Chart name on the reverse side
Chart
Chart explanation
Adjust the chart to the
desired distance and
tighten the knob.

4
BEFORE USE: Configuration
9. Forehead rest
The patient's forehead rests here during refraction. Clean it before each refraction.
See "5.2 Cleaning Forehead Rest" (Page 108).
10. Face shield
The patient's face touches here during refraction. Clean the face shields before each refraction.
See "5.3 Cleaning Face Shields" (Page 108).
1.3.2 Control box
1. Eye Care card reader
Reads objective data (AR data) or past lensometry data (LM data) via an Eye Care card.
The specified optional Eye Care card is necessary. IC cards for the older model NIDEK IC card system (RT4IC-1) or
commercial IC cards are not compatible.
2. Control panel
See “{Control panel” (page 9) for details.
3. Right side key
Displays the Main Menu screen.
4. Dial
Changes any measurement value.
The selected (highlighted) value can be changed.
When the dial is turned clockwise, the value changes to the negative.
When the dial is turned counterclockwise, the value changes to the positive.
Turn the dial while pressing changes the increments. See page 60.
5. Dial key
Switches the mode (S, C, A).
• The parts that contact the patient during refraction are composed of the following materials:
Forehead rest: polypropylene
Face shields: ABS resin
8. Display
1. Eye Care card reader
2. Control panel
3. Right side key
4. Dial
5. Dial key
7. Left side key
6. Front key

5
BEFORE USE: Configuration
1
6. Front key
Used to forward to the next programmed refraction sequence.
Pressing the next chart icon on the screen also forward next programmed refraction sequence.
+ Front key ⇒Returns to the previous sequence.
7. Left side key
Displays the chart control screen.
The chart control screen switches the chart or controls the chart such as near
point lamp.
See "2.6 Chart Presentation" (Page 34).
Pressing the present chart icon on the screen also displays the chart control
screen.
8. Display
Displays the data such as SPH (S), CYL (C), AXIS (A) and the presented
chart.
The LCD display is a touch-screen panel.
For details, see “{Display” (page 5).
{Display
• The materials composed of the parts that contact the patient during refraction are as
follows:
Control panel, right/left side key, dial, dial key: ABS resin
Display, power switch, general electrical component
Date
Measurement mode key
12
3Time
Operation message
7
Function keys
98
4
6
5
Unaided
13
12
11
10

6
BEFORE USE: Configuration
1. PD display and change key
Enters the mode to change the pupillary distance.
Monocular PD (1/2 PD) ⇒ Press the R or L side of the binocular PD field in PD mode ( or in PD
mode) to enter the value.
Leave the mode ⇒ Press the PD key again.
2. Auxiliary lens keys
Displays the current inserted auxiliary lenses.
Pressing this key displays the auxiliary lens selection screen.
Alternately pressing this key while pressing opens/closes the measuring window.
3. Far or near mode key
Displays the current measurement mode (far or near mode).
When in far mode, the key indication is “FAR” and when in near mode, the key indication is “NEAR”.
Far mode is automatically selected when the power is turned on or after data is cleared.
Near mode is used to test the near visual function after far vision testing and addition power measurement. The
refractor head converges to the working distance of 40 cm (variable) automatically in near mode.
The ADD key is not available in near mode. The near SPH values are calculated by adding the ADD values to the
far SPH values and the lenses are set accordingly. It is also possible to use only the far SPH values in near mode
when the SPH Far →Near parameter is set to SPH.
4. Measurement mode keys
Used to specify the measurement mode.
The selected measurement mode data is displayed at the center of the screen. However, pressing [Subj]
with no subjective value entered copies the data in AR or LM mode depending on the Preset power of the
Subj parameter. The key selected is displayed in the upper-left corner of the screen.
Pressing a data key with an empty field copies the displayed data into that field. In addition, pressing any
data key together with copies the displayed data regardless of whether or not data is contained in
that field.
See "2.2 Entering Data" (Page 22) for data entry method.
4-1. [Unaided]
Measures the unaided visual acuity.
The corrective lens power in the refractor head is 0 D.
4-2. [LM]
Enters the lensometry (LM) data.
4-3. [AR]
Enters the data from an auto refractor or a retinoscope.
4-4. [Subj]
Used to obtain the full correction.
When the data is received from an auto refractometer or a lensmeter via an Eye Care card, this field opens
automatically.
4-5. [Final]
Used to obtain the final prescription and best-corrected visual acuity.
Pressing this key copies the full correction data from the subjective data field and adjusts it to the final prescription.
• When the refractor head is converging, have the patient off his face temporarily from the
refractor head.