Nidek Medical GYC-1000 User manual

NIDEK
GREEN LASER PHOTOCOAGULATOR Model GYC-1000
COMBINATION DELIVERY UNIT
[ATTACHABLE TO NIDEK YC-1300/1400, YC-1600]
OPERATOR’S MANUAL
(SUPPLEMENT TO THE GYC-1000 OPERATOR’S MANUAL)

* Specifications are subject to change without notice for improvement.
NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan
(Manufacturer) Telephone: [phone]
Facsimile: (0533) 67-6610
NIDEK CO., LTD : 6th Floor, Takahashi Bldg., No.2, 3-chome, Kanda-jinboucho
(Tokyo Office) Chiyoda-ku, Tokyo 101-0051, Japan
Telephone: [phone]
Facsimile: [phone]
Telex: 2226647 NIDEK J
NIDEK INCORPORATED : 47651 Westinghouse Drive Fremont, California 94539, U. S. A.
(United States Agent) Telephone: [phone]
Facsimile: [phone]
NIDEK SOCIETE ANONYME : Europarc 13, rue Auguste Perret, 94042 CRETEIL, France
(Authorized Representative) Telephone: [phone]
Facsimile: (01) 49 80 32 08 2003.09
17142-P9A2A
PrintedinJAPAN

BEFORE USE OR MAINTENANCE OFTHE COMBINATION SYSTEM,
READ THIS MANUALAND OPERATOR’S MANUAL OF THE MAIN
BODY.
THIS OPERATOR’S MANUAL CONTAINS ONLYINFORMATION TO
UNDERSTAND THE OPERATING PROCEDUREAND MAINTENANCE
OFTHE COMBINATION DELIVERYUNIT (ATTACHABLE TO NIDEK
OPHTHALMIC YAG LASER SYSTEM YC-1300/1400, YC-1600).
This manual contains information to understand the system which allows selection
between the green laser beam and the YAG laser beam as a result of attaching the
delivery unit to the slit lamp of the YAG laser system.
This manual provides general descriptions of the delivery unit, cautions for safety,
specifications, accessories, operating procedures, and maintenance.
As for the detailed operating procedures of the YAG laser system or other optional
delivery units, refer to the particular operator’s manual.
IEC60601 isapplied tothe contentsdescribed inthis manual. To understandthe correctuse
of the photocoagulation system, this manual and operator’s manual of the GYC main body
are needed.
Especially, cautions for safety and operating procedures should be understood thoroughly
before using the laser system. Be sure to store this manual with the system and refer to
it when necessary.
Use of the combination system is limited to the treatment of eye disease by qualified
physicians only. The physicians are responsible for the application of the combination
system and the technical selection of the treatment of various eye diseases.
If you find any problems during, or have questions about operation, please contact
NIDEK or your authorized distributor.
[NOTE]
This delivery unit is attachable to 3 types of YAG laser systems, YC-1300/1400, YC-
1600.
Figures used in the manual to describe the YAG laser system are mainly for the YC-1400.
In this manual, 2 laser systems are abbreviated as follows:
• GYC.....Green Laser Photocoagulator Model GYC-1000
•YC........OphthalmicYAG Laser System ModelYC-1300/1400, orYC-1600
[Note on display of the exposure time and the interval time (in the repeat mode)]
Whentheexposuretimeortheintervaltime(intherepeatmode)onthedisplayofthecontrolbox
of the GYC-1000 is less than “1.00” or “1.0”, “0” before the decimal point is displayed small.
(Example:ifthesettingis“0.30”,thedisplayshows“ ”.)

Page
Table of Contents
§
1INTRODUCTION .......................................................................................................1-1
1.1OutlineoftheCombinationDeliveryUnit.....................................................................1-1
1.2ClassificationsoftheCombinationDeliveryUnit ..........................................................1-2
1.3SymbolInformation ....................................................................................................1-3
§
2SAFETY .........................................................................................................................2-1
2.1Storage,Transport,and InstallationPrecautions...........................................................2-1
2.2Wiring andConnectionPrecautions .............................................................................2-2
2.3Usage Precautions ......................................................................................................2-3
2.4After Use Precaution, Maintenance, and Checks .........................................................2-5
2.5Disposal .....................................................................................................................2-6
2.6Safety Devices ...........................................................................................................2-6
2.7NominalOcular Hazard Distance (NOHD) .................................................................2-6
2.8 Labels ........................................................................................................................2-7
§
3SYSTEM DESCRIPTION...........................................................................................3-1
§
4INSTALLATION..........................................................................................................4-1
4.1AttachingtheCombinationDeliveryUnit .....................................................................4-1
4.1.1 Preparation .......................................................................................................4-1
4.1.2Attachingto theYC slit lamp..............................................................................4-2
4.1.3Installing............................................................................................................4-4
4.2 Connection to theYAG Laser System .........................................................................4-8
4.2.1 Connection to theYC-1300/1400 .....................................................................4-8
4.2.1.1 Connection to theYC-1300/1400 (Old type) ........................................4-8
4.2.1.2 Connection to theYC-1300/1400 (New type).......................................4-9
4.2.2 Connection to theYC-1600 ............................................................................4-10
4.3DetachmentoftheCombinationDelivery...................................................................4-10
4.4Adjustment of the Green Laser Spot ......................................................................... 4-11
§
5OPERATING PROCEDURES ...................................................................................5-1
5.1 Starting the Delivery System.................................................................................... 5-1
5.2 Preparation ...............................................................................................................5-3
5.3 Laser Emission (Green Laser Beam)........................................................................5-6
5.4 End of Operatoin ......................................................................................................5-9
5.5 Use of the YAG Laser Beam ..................................................................................5-10
5.6IndicaitonsforMisoperation .....................................................................................5-12
5.7Emergency Stop .......................................................................................................5-12
5.8Storing in the Carrying Case .....................................................................................5-13

§
6MAINTENANCE.......................................................................................................... 6-1
6.1Cleaning .....................................................................................................................6-1
6.1.1Cleaningtheexterior..........................................................................................6-1
6.1.2Cleaning the opticalparts...................................................................................6-1
§
7SPECIFICATIONS ......................................................................................................7-1
§
8ACCESSORIES............................................................................................................8-1
8.1 Standard Configurations...........................................................................................8-1
8.2 Options .....................................................................................................................8-1
Words in This Manual..................................................................................End of this manual

§1
INTRODUCTION
1.1 Outline of the Combination Delivery Unit
This unit is needed to comprise the combination system which enables you to emit the green
laser beam or YAG laser beam while performing the observation with the slit lamp of the YAG
laser system. This delivery unit is mounted on the slit lamp of theYAG laser system and connected
to the NIDEK GREEN LASER PHOTOCOAGULATOR, Model GYC-1000 using the connecting
cable and fiber-optic cable.
With the combination system, selection can be made between photocoagulation by the green
laser beam (wavelength: 532 nm, frequency-doubled, solid state) and photodisruption by the
Nd:YAG laser beam. In addition, this selection can be easily made by changing the optical path
of the laser beam with the laser select lever, and various kinds of safety devices are integrated
into the system to emit the selected laser beam only.
The combination delivery unit is attachable to the following 3 YAG laser systems:
• NIDEK OPHTHALMIC YAG LASER SYSTEM YC-1300/1400
• NIDEK OPHTHALMIC YAG LASER SYSTEM YC-1600
CAUTION
• United States Federal law restricts this device to sale by or on the order of a physician.
Fiber-optic cable Combination delivery unit
Laser emission
Operator
GYC-1000
main body
Foot switch
Motorized table
Protective filter unit
Patient
YC-1300/1400, main body
YC-1600 main body

1 - 2
1.2 Classifications of the Combination Delivery Unit
[Classification under the provision of 93/42/EEC (MDD)] Class IIb
As long as this delivery unit is connected to the main body, this delivery unit is classified as a
Class IIb unit.
[Class of the laser system] Class 4
As long as this delivery unit is connected to the main body, this unit is classified into Class 4
system.
A Class 4 laser is capable of producing an injury to eyes by direct laser exposure or diffuse
reflections (0.5 W or more).
[Protection method against electric shock] Class I
As long as this delivery unit is connected to the main body, this delivery unit is classified as a
Class I system.
A Class I system is a system in which the protection against electric shock does not rely on
basic insulation only, but which includes an additional safety precaution in such a way that
means are provided for the connection of accessible conductive parts to the protective (earth)
conductor in the fixed wiring of the installation in such a way that accessible conductive parts
cannot become live in the event of a failure of the basic insulation.
[Degree of protection against electric shock] Type B applied part
As long as this delivery unit is connected to the main body, this delivery unit is classified as a
system with a Type B applied part.
Asystem with a Type B applied part provides an adequate degree of protection against electric
shock particularly regarding;
- allowable leakage currents
- reliability of the protective earth connection (if present)
[Degree of protection by the enclosure]
This delivery unit is classified as an IP20.
An IP20 system is protected against an ingress of solid foreign objects, such as a finger
having a diameter of 12.5 mm or greater, however, it is an ordinary system without protection
against an ingress of liquids. Be careful not to exposure water to this delivery unit.
[Sterilization methods recommended by the manufacturer]
This delivery unit does not have any part to be sterilized or disinfected.
[Degree of safety in the presence of flammable anesthetics and/or flammable cleaning agents]
This delivery unit should be used in an environment where no flammable anesthetics and/or
flammable cleaning agents are present.

1 - 3
[Mode of operation]
As long as this delivery unit is connected to the main body, this unit is an continuous operating
system.
[Classification by transportability]
This delivery unit is classified as a transportable system.
1.3 Symbol Information
This symbol means that the system is classified as a system with a type B applied part.
This symbol indicates that important descriptions related to operation or maintenance
are contained in the operator’s manual and that an operator must refer to the operator’s
manual prior to operation and maintenance.

§2
SAFETY
Inthismanual,signal words are used to designate the degree or level of safety alerting. The
definitionsareasfollows.
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,
may result in minor or moderate injury or in a property damage
accident.
Evensituationsindicatedby WARNINGand CAUTIONmayresultinseriousinjury
undercertainconditions.Safetyprecautionsmustbestrictlyfollowedatalltimes.
2.1 Storage, Transport, and Installation Precautions
CAUTION
• Instorage,transport,andinstallation,verifythatthefollowingconditionsaremet:
-Not exposed to direct sunlight or ultraviolet rays
- Not exposed to rain or water
- No chemicals or organic solvents are present
- No poisonous gas, sulfur, salt, or large amount of dust is contained in the air
-Level and stablewithout vibration and shock
-Thefollowingarethespecifiedenvironmentalconditionsforstorage andtransport(packed
condition),andinstallation(unpackedcondition)
For storage and transport:
Temperature: 14 to 122 ºF (- 10 to 50 ºC) / Humidity: 10 to 95 % (non-condensing)
Forinstallation:
Temperature: 50 to 86 ºF (10 to 30 ºC) / Humidity: 30 to 85 % (non-condensing)
• Intransportofthecombinationsystem,observethefollowinginstructions:
-Toavoidinjuryormalfunction,removethedeliveryunitfromthemainbodyandstorethem
inthe carryingcase orshippingcarton (keepthe shipping cartonused fordelivery)
-Tomaintaintheperformanceoflaseremission,puttheprotectivecoveronoverthedichroic
mirror and the protective cap on the fiber connector before storing them in the carrying
case.
- To avoid shift of the optical axis, do not subject the main body or the delivery unit of the
combinationsystemtophysicalshockeveniftheyarepackedinthecarryingcaseorshipping
carton.
- To avoid condensation, keep the change in temperature as little as possible.

2 - 2
CAUTION
• Ininstallationofthecombinationsystem,observethefollowinginstructions:
-To avoidtroubles fromcondensation, letthe combinationsystem situntilthecondensation
hasdissipatedbeforeinstallation.
- To avoid malfunction from change in temperature and condensation, do not install the
combinationsystemwhere itisexposed tothedirect flowofair conditioning.
-Toavoidadverseeffectonthelens ormirror, donotinstallthe combinationsystemina high
temperature,highhumidity,ordustyenvironment.
-Toletthecombinationsystemdissipateheatproperly,installitsothattheairventontherear
panel and the wall or the foreign object are more than 10 cm apart.
• Attachor remove the delivery unitto the main body withthe key switch off ( ).
Ifthe delivery unitis attached oreremoved with thekeyswitch on ( ),an error mayoccur.
2.2 Wiring and Connection Precautions
CAUTION
• Inhandlingthepowercordandcables,observethefollowinginstructions:
- To avoid short circuit or fire from broken wire, perform the connection and disconnection
holdingtheplug,and donotcoil thepowercordandconnectingcablesforcefully inashort
curvature,or crush orpinchthem with heavyobjects.
- To avoid short circuit or fire, replace the broken wire with a new one.
- Never pull the power cord or a connecting cable to transport the system.
• Inhandlingthepowercord,observethefollowinginstructions:
-Toavoidmalfunctionorelectricshock,useagroundedpoweroutletwhichmeetsthepower
requirementsspecifiedinthelabelonthemainbody.
-To avoidmalfunction or fire,donot overload theelectrical outlet.
• Inhandlingtheconnectingcableofthecombinationsystem,observethefollowinginstructions:
- To avoid malfunction or failure of the system, connect the cable plug to the DELIVERY
connectoronthefront panel of the main body.
• Inhandlingthefiber-opticcable,observethefollowinginstructions:
- To avoid damage or deterioration in laser delivery performance, do not let any part of the
fiber-optic cable bend with a radius of 10 cm (4.5 in) or more.
- Connect the cable plug to the FIBER connector on the front panel of the main body.
• When the GYC or YC is used with other equipment simultaneously, observe the following
instruction:
- To avoid electric shock caused by potential difference between equipments, connect each
onespotentialequalizingconenctorwithaspecialcable.

2 - 3
2.3 Usage Precautions
WARNING
• Useofcontrolsor adjustments,orperformanceof proceduresotherthanthosespecifiedherein
mayresultinhazardousradiationexposure.
• Inhandlingofthedeliveryunit,observethefollowinginstructions:
-OnlyservicetechniciansproperlytrainedbyNidekmayinstallandconfigurethecombination
system.Onlyqualifiedphysiciansmayperformemissionofthegreenlaserfortreatment.
-Toavoid hazardousradiation exposure,donotperformoperationwhichisnotdescribedor
differentfrom theprocedurespecifiedintheoperator’smanual.
-To avoid electric shock, do not modify nor touch the internal structure.
-To maintain theperformance of laser emission, neversoil or scratch the lensor mirror.
-To obtainappropriate result oflaseremission, do notadjust the laserfocusadjustment ring
ortheilluminationfocusadjustmentringexceptforinstallationandservice.
• Beforestartingthecombinationsystem,observethefollowinginstructions:
-To avoid ignition or explosion from the laser emission, verify that there is no flammable
anestheticgasintheoperatingroom.
-To protecttheeyes ofpersonnelintheoperatingroom,instruct themtowear recommended
safety goggles (or the equivalent) before the operation and not to look at the laser beam
directlyduringtheoperation.
Recommendedgoggles ......ModelYL-300 forfrequency doubled Nd:YAG:D315-532
L8YLDIN
(Produced byYAMAMOTO KOGAKU CO., LTD. Japan)
- To prevent accidents, perform the check following 5.3 Checks Before Use and 5.4
Function Checks (p. 5-3) in the operator’s manual of the main body and record each
resultin thelist (p.5-5) whenstarting operationofthe combinationsystem.
• Duringoperationofthecombinationsystem,observethefollowinginstructions:
- To avoid unintended exposure to the laser beam, do not gaze at the aiming beam that is
emitted from the laser aperture or direct it toward personnel.Always pay attention to the
directioninwhichitisemitted.
-Toavoidaccident caused byunauthorized personnel, donot leave thecombination system
unattendedwhileit is operational. If the operator has to be away from the system, turn the
key switch to the off position, remove the key, and store it in the customary place.
• Duringoperationofthephotocoagulationsystem,observethefollowinginstructions:
-Donotusethephotocoagulationsystemsimultaneouslywithotherelectronicequipmentto
avoidelectromagneticinterferencewiththeactionofthesystem
-Donotusethephotocoagulationsystemsimultaneouslyinthesameroomwithotherequipment
suchasalife-supportequipmentthathasseriouseffectsonthelifeofpatientandthetreatment,
orothermeasurementortreatmentequipmentthatinvolvessmallsignal.
- Do not use cables and accessories that are not specified for the photocoagulation system
becausethatmaydeterioratetheelectromagneticcompatibility.
- Do not use the photocoagulation system simultaneously with portable radio frequency
communicationsystemsbecauseitmayhavean adverseeffect onthe system.

2 - 4
CAUTION
• InuseoftheYCslitlamp,observethefollowinginstructions:
-Toavoiddamagetotheretinaofthepatient,onlytrainedphysicianmayperformobservation
usingtheYCslitlamp.Donotemitunnecessarilyintenselaserbeam.
-Toavoidthebluehazard,settheilluminationforobservationtotheminimumlevelinitially,
andthenincreaseituntilthedesiredintensitycanbeobtained.Afterthe observation,lower
theilluminationintensitytotheminimumlevelagain.
- Wipe the forehead rest, the chinrest, and the grips of the YC slit lamp every time before
observingapatienttokeep them clean.
• Forlaseremission,observethefollowinginstructions:
-Whenthegreenlaserbeam (wavelength: 532 nm) of the GYC-1000 is emitted into tissue,
followingsymptomsmayoccur. Pay attentiontothedirection oftheaimingbeam toavoid
emittingthelaserbeamintotheeye orontoskin inadvertently.
-Skinsymptoms........... Damage to the cornea, etc. or blindness
-Eye symptoms............ Pain orburn
-Toavoid exposure tothereflected laser beam,verifythat there isno reflective object inthe
opticalpathbeforelaseremission.
-To avoidexcessivereaction,setthelaserto alowoutputpowerinitially,and thenincreaseit
untilthe desired effectcanbeobtained.Alwaysset the outputpower to theminimumafter
thelaseremission.
- To avaoid damage to the cornea or the crystalline lens, if the indirect lens is used for laser
emission,take themagnification intoconsideration andtake carenot tomake thespotsize
largerthanapproximately200µm.
- To avoid exposure to the accidentally emitted laser beam, always place the combination
systeminthe condition in which the laser cannot be emitted (standby mode) except when
emittingthelaser.
- Confirm that the combination system is in a proper condition for laser emission by the
following procedures: (if any abnormality is found in step 2, ask Nidek for check and
adjustment.
1.Projecttheaimingspotonanon-reflective,
evensurface.
2.Verifythattheintensityoftheillumination
spotis evenaround thecenter asshownin
thefigureontheright andthatloweringof
theintensityorvignettingdoesnotoccur.
• Whenthe green laser beam is emitted in photocoagulationusing theYCslitlamp, the color of
thegreenlaserbeamcanbeseenslightlyintheviewfieldoccasionally.
Thisoccurswhenthe beam that is reflected from the contact lens enters the optical system for
observation.Thesymptomdiffersaccordingto thetypeofcontactlens,andconditioninwhich
the green laser beam enters the contact lens.
Thelightintensityisattenuatedtoasafelevelbytheprotectivefilterthatisincorporatedintheslit
lamp.
Ifanintense lightis seen,stopthe useof thesystemimmediately,and askNIDEKforchecking
ofthesystem.

2 - 5
2.4 After Use Precaution, Maintenance, and Checks
CAUTION
• Afteruseofthecombinationsystem,observethefollowinginstructions:
-To avoidthe tracking phenomenon, if thesystem will not beusedfor a long periodof time,
disconnect the power cord from the grounded power outlet.
-To avoiddust and scratches,if the combinationsystemwill not beused for alongperiod of
time,disconnectthedeliveryunitfromthemainbodyandtheYCslitlampandstorethemin
thecarryingcase.
-To maintain the performance of laser emission, when the combination system is not being
used, turn off the power and put dust cover over it.
• Formaintenanceofthecombinationsystem,observethefollowinginstructions:
-Toavoidaccidentscausedbyimproperrepairofthesystem,onlyservicetechniciansproperly
trainedby NIDEK may repair the system.
-To maintain the performanceoflaser emission, take care not to scratch oraccumulate dust
on the optical parts such as lens and mirror.
- To protect the exterior or maintain the operability of the system, do not use organic or
abrasivesolventsforcleaning.
• Forcheckofthecombinationsystem,observethefollowinginstructions:
-To maintain the performance of laser emission, ask NIDEK or your authorized distributor
forcalibration of outputpower and exposure timeof the laserbeam,and for measurement
of the earth resistance and leakage current once a year.
- To avoid infection, wipe the surface of the delivery unit (especially the inside parts of the
headband and overband) with a clean cloth dampened with alcohol before returning it to
NIDEKfor repair or maintenance.

2 - 6
2.5 Disposal
CAUTION
• Whendisposingofthedeliveryunit,followthelocalgoverningordinancesandrecyclingplans.
(Fordetails,askNIDEKoryourauthorizeddistributor.)
• Whendisposingofpackingmaterials,sortthembymaterialandfollowlocalgoverningordinances
andrecyclingplans.
• When disposing of the GYC main body and theYC main body, see the operator’s manual for
each.
2.6 Safety Devices
[Protectivefilter]
To protect the operator’s eye from the reflected light of the green laser beam, the protective filter
can be attached to theYC slit lamp.
Ifthe filteris not setin the observationoptical path, thegreen laserbeamcannot beemittedthough
the foot switch is pressed.
[LASER EMISSION indicator]
During the combination system operation (while the key switch is in the ON ( ) position), the
indicatoronthedeliveryunitlightsup tocallthe operator’sattention.
[Manual reset function]
After the combination system is stopped due to the stop signal from the remote connector, the
powerbeingcut,anunintendedcause,etc.,thesystemdoesnotrestartautomaticallyeventhoughall
problem have been solved and the system is ready to be restarted. It is on the operator’s decision
whether to restart the system or not. To restart the system, turn the key switch to the OFF ( )
position(manualreset),and then to the ON ( ) position again.
2.7 Nominal Ocular Hazard Distance (NOHD)
Thenominal ocular hazarddistance(NOHD) of thegreenlaser beam ofthecombination system isas
follows:
NOHD = 14.6 m

2 - 7
2.8 Labels
In order to call the operator’s attention, the appropriate warning labels are attached to the specified
locationsonthedeliveryunit.
[Combinationdeliveryunit]
[Protectivefilterunit]

2 - 8
[Carryingcase](option)

§3
SYSTEM DESCRIPTION
[Combination delivery unit]
Fiber-optic cable
LASER EMISSION indicator
Filter connector
Screw
Micromanipulator lever
Spot size control knob
Laser focus ring
Laser select lever
Dichroic mirror
YC connector
GYC connector

3 - 2
Fiber-optic cable
Delivers the laser beam from the GYC to the
combinationdeliveryunit.
Its connector is connected to the FIBER con-
nector on the connector panel of the GYC.
LASER EMISSION indicator
Lights when the key switch of the GYC is
turned to the ON ( ) position.
Filter connector
The filter connector of the protective filter unit
is connected here.
Screw
Fixes the delivery unit to the YC slit lamp.
Micromanipulator lever
Used to finely adjust the spot positions of the
aiming beam and green laser beam of the
GYC.
Spot size control knob
Used to adjust the spot size of the aiming
beam and green laser beam of the GYC in the
range between 50 and 500 µm.
The spot size is indicated on the control box
of the GYC.
Laser focus ring
Used to align the focal points of the aiming
beam and green laser beam of the GYC with
those of the YC.
Laser select lever
Used to select the laser beam to be used be-
tween the green laser beam and YAG laser
beam.
Dichroic mirror
Aligns the green laser beam with the illumi-
nation light and delivers them to the affected
area.
YC connector
Connected to the PRINTER connector on the
rear side of the power supply unit of the YC-
1300/1400 or to the Remote connector on the
switch box of the YC-1600.
GYC connector
Connected to the DELIVERY connector on
the connector panel of the GYC.

3 - 3
[Protective filter unit]
Connecting cable
Knob
Filter lever
Connecting cable
Connected to the filter connector of the de-
livery unit.
Knob
Fixes the binocular tube of the YC slit lamp
to the protective filter unit.
Filter lever
Used to control the protective filter manually.
By sliding the lever clockwise viewed from
the operator’s side, the filter is inserted into
the observation optical path, and the filter is
removed by sliding it counterclockwise.
Filter IN position
Filter OUT position

§4
INSTALLATION
4.1 Attaching the Combination Delivery Unit
4.1.1 Preparation
1. Remove thetonometer holder fromthe top of
theYC microscope.
Remove the 2 screws.
2. Attach the mounting block to where the
tonometer holder was.
Use the 2 screws to fix the mounting block.
3. Attach the absorption plate to the top of the
prism head of the illumination tower.
Use double-sided tape to fix the absorption
plate.
Tonometer holder
Mounting block
Absorption plate