Yeasn HX-400 User manual

HX-400
Pupilometer
User Manual
Version: 1.4
Revision date: 2022.3

Product Name: Pupilometer
Nome do produto: Pupilômetro
Nombre del producto: Pupilómetro
Ürün Adı: Pupilometre
Nome prodotto: Pupillometro
Produktname: Pupillometer
Nom du produit : Pupilomètre
Име на продукта: Пупилометър
Produkto pavadinimas: Pupilometras
Nazwa produktu: Pupilometr
Název produktu: Pupilometr
Toote nimi: Pupilomeeter
Produkta nosaukums: Skolēna mērītājs
Όνομα προϊόντος: Μαθητή
User Manual Download link: www.yeasn.com/en/
Link para download do manual do usuário: www.yeasn.com/en/
Manual de usuario Enlace de descarga: www.yeasn.com/en/
Kullanım Kılavuzu İndirme linki: www.yeasn.com/en/
Manuale d'uso Link per il download: www.yeasn.com/en/
Link zum Herunterladen des Benutzerhandbuchs: www.yeasn.com/en/
Lien de téléchargement du manuel d'utilisation : www.yeasn.com/en/
Линк за изтегляне на ръководството за потребителя: www.yeasn.com/en/
Naudotojo vadovo atsisiuntimo nuoroda: www.yeasn.com/en/
Link do pobrania instrukcji obsługi: www.yeasn.com/en/
Uživatelská příručka Odkaz ke stažení: www.yeasn.com/en/
Kasutusjuhendi allalaadimise link: www.yeasn.com/en/
Lietotāja rokasgrāmatas lejupielādes saite: www.yeasn.com/en/
Εγχειρίδιο χρήστη Σύνδεσμος λήψης: www.yeasn.com/en/

Preface
Thanks for purchasing and using our pupilometer.
Please read this User Manual carefully before using this
device. We sincerely hope that this User Manual will provide you
with sufficient information to use the device.
Our pursuit is to provide people with high-quality, complete-function
and more personalized devices. Information in promotional materials
and packing boxes is subject to changes due to performance
improvement without additional notice. Chongqing Yeasn Science -
Technology Co., Ltd. reserves the rights to update the devices and
materials.
If you have any questions during using, please contact at our service
hotline: [phone], we will be very happy to help you.
Your satisfaction, our impetus!
Information of manufacturer
Name: CHONGQING YEASN SCIENCE–TECHNOLOGY CO., LTD
Address: 5 DANLONG ROAD, NAN’AN DISTRICT, CHONGQING,
CHINA.
Tel: [phone]

Content
1. Introduction..................................................................................... 1
2. Safety Notice .................................................................................. 5
3. Description of the structure ............................................................7
4. Preventive inspection.................................................................... 12
5. Operational Instructions................................................................ 12
6. Clean and disinfection of application parts .................................. 18
7. Maintenance.................................................................................. 18
8. Troubleshooting............................................................................19
9. Environmental Conditions and Service Life................................. 20
10. Environmental Protection ...........................................................20
11. Manufacturer’s Responsibility.................................................... 21
12. Guidance of EMC and other interference...................................21

1
1. Introduction
1.1 Uses
Principle: The pupilometer takes the advantage of the image-forming
principle of optical lens. Optical lens imprints the observed object at
a specified distance, then the patient watches at the observed object,
and the optometrist can find out the bright points of the observer’s
eyes via the measuring window, meanwhile the optometrist moves
the left and right measuring keys to make the related mechanical
hairsprings to coincide with the bright points of the observer’s eyes,
so as to measure the distance of the pupils.
Intended use: To measure the distance between the pupils of the
human eye.
Medical purpose: To measure the distance between the pupils of the
human eye.
Target groups of patients: adults, children.
Contact with human body parts：Nose and forehead.
Intended users: optometrists in hospital ophthalmology and optical
shops.
Specific qualifications of device users and/or other persons: have a
qualification certificate for optometry and glasses.
Contraindications: none.
1.2 Characteristics
This device is designed in a scientific and reasonable way,
integrating technologies on mechanical hairspring orientation

2
measurement system, optical system, ESS and microcomputer into a
whole.
＊Using mechanical hairspring to level at the reflecting point of
human cornea to realize the consecutive measurement. It features
directness of point-sampling and high accuracy of orientation.
＊Adopting line-shaped sensors of high definition, advanced
intellectualized electronic systems and digital display which allow
the testing results more visible, legible and accurate.
＊LED lamp-house and a design of low-power consumption ensure
the prolonged service life of batteries.
＊PD and VD measurement is available.
＊It offers the +2.00D compensation for the degree of eyesight.
＊The brightness of LED lamp-house is adjustable.
1.3 Main technical indexes
1.3.1 Effective range of measurement
Binocular pupillary distance: 45mm ~ 82 mm
Left or right pupillary distance: 22.5mm ~ 41 mm
1.3.2 Indication error: ≤0.5mm
1.3.3 Asymmetrical error: ≤0.5mm
1.3.4 Distance of target: 30cm ~ ∞
1.3.5 Power source: Voltage: DC 3V
Specification: 5# AA battery
Quantity: 2 pieces (2×1.5V AA batteries)

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4
CE marking
Correct Disposal of This Product (Waste Electrical &
Electronic Equipment)
Type B applied part（Nose Bearer and Forehead bearer）
Medical device
Expiration date
Consult instructions for use
Refer to instruction manual / booklet
Authorized European representative
Catalogue number
Unique Device Identifier
Model number
G.W. Gross Weight
DIM. Dimension
Fragile, handle with care
Keep dry
Temperature limit
Humidity range identification

5
Atmospheric pressure range identification
1.5 Part List
1）Pupilometer 1set
2）UserManual 1unit
2. Safety Notice
Please read the following precautions carefully to avoid
personal injury, device damages or other possible hazards:
●Use the device indoors and keep it clean and dry; do not use it
under inflammable, explosive, high temperature and dusty
environment;
●Do not use the device near water; also be careful not to make any
kinds of liquid drop onto the device. Do not place the device in damp
or dusty places, nor place it where humidity and temperature change
quickly;
●Do not dismantle or touch the interior parts of the device,
otherwise it may cause electric shock or device failure;
●The device has passed electromagnetic compatibility test. Follow
below instructions related to EMC (electromagnetic compatibility)
when mounting and using the device:
- Do not use the device with other electric devices to avoid
electromagnetic disturbance to the device;

6
- Do not use the device nearby other electric devices to avoid
electromagnetic disturbance to the device;
●Not used in oxygen rich environment, Not intended for use with
flammable anesthetics, Not intended for use with flammable agents.
●Pay attention to the polarity when changing the battery to prevent
battery short circuit.
●Notification：Any serious event related to the device to the user
and/or patient shall be reported to the manufacturer and competent
authority of the Member State where the user and/or patient is
located.
Caution: The user is cautioned that changes or modifications
not expressly approved by the party responsible for compliance could
void the user's authority to operate the equipment.

7
3. Description of the structure
3.1 Description of the front panel
Fig.1
F1. Measuring Window
The working window of the testing personnel.
F2. Optic Distance Knob
It is used to conduct conversion of measured value of pupillary
distance at different optic distances of 30cm ~ ∞.
F3. Left Pupil Measuring Key
It is used to measure left pupillary distance. Sliding the key to the
outer side will make pupillary distance pointer move in opposite
direction of the nose bearer. At this time, the left eye pupillary
distance and binocular pupillary distance rise in numerical value.

8
Sliding the key to the inner side will make the pupillary distance
pointer move towards the direction of the nose bearer. Now
numerical value of the pupillary distance decreases.
F4. Function Transition Key
PD and VD measurement mode can be switched by pressing
Function Transition key. Besides, it can be used to set LED
brightness, automatic power-off time and measurement precision.
F5. Display Window (as shown in Fig.2)
It displays the measured numerical value of PD or VD, and some
other relevant information.
Fig.2
*When reading information on the display window, the Right value
denotes the distance between center of nose bridge and right eye
pupillary distance or VD of the right eye, and the Left value denotes
the distance between center of nose bridge and left eye pupillary
distance VD of the left eye. PD value stands for the distance between
left eye pupil and right eye pupil. The unit is mm.

9
F6. Nose Bearer
The testee's bridge rests on the nose bearer so that the position of the
testee's pupils is fied.
F7. Observation Window
Two windows provided for a testee to stare at the target with his (her)
eyes.
F8. Forehead bearer
The testee's forehead rests on the forehead bearer so that the position
of his pupils is fied.
F9 ON/Off KEY
Press this key once to turn on the device, and press it again to turn
off.
F10. Right Pupil Measuring Key
It is used to measure right pupillary distance. Sliding the key to the
outer side will make pupillary distance pointer move in opposite
direction of the nose bearer. At this time, the right eye pupillary
distance and binocular pupillary distance increase in numerical value.
Sliding the key to the inner side will make the pupillary distance
pointer move towards the direction of the nose bearer. Now
numerical value of the pupillary distance decreases.
Nose Bearer, and Forehead bearer constitute a Type B applied part.

10
3.2 Description of rear panel
Fig.3
B1. Battery Lid
Move the lid parallel to change batteries.
B2. Electronic Panel
B3. Monocular Covering Knob
The covering of the testee's right or left eye will be realized by
turning the knob.
B4. Compensating Ocular Key
Sliding the key can make a +2.00D compensation for the diopter of
eyes.

11
3.3 Viewed from the Measuring Window
Fig.4
C1. Measuring Window Glass
Testee sees through it to the green target.
C2. Calibration Reference Mark
It is used to check measurement accuracy.
C3. Benchmark Hairspring
When the optometrists use the device, they can slide the key and
make the benchmark hairspring level at the reflecting light spot of
the testee's pupils.
C4. Guide Mark
Guide Mark is used to target at the top of cornea of the testee during
the process of VD measurement.
3.4 Viewed from the Observation Window
Target to be stared at in the center of the device's inner visual field,
an eyeball-shaped circle can be seen. It is a green target image
surrounded with a bright ring. A testee should stare at the target with
both eyes when measuring. To adapt to the favor of people's eyes, the
device sets the adjustable function of LED brightness.

12
Fig. 5
4. Preventive inspection
The operator should conduct preventive inspections before use.
1) The observation window and measurement window should be
clean.
2) The numbers displayed on the display window should be normal.
3) Inspection cycle: before use every day.
5. Operational Instructions
This is a high-tech intelligent instrument, which is very easy to
operate. Please operate it according to the following procedures, thus
you can get measured data easily and rapidly.
5.1 About Battery
Before using the device, please put 2 pieces of 5# AA alkali batteries
into its battery box. When it is not used, please take them out to save
electric energy.
*Only high energy alkali battery is applicable, and please do not use
common acidic one so as to avoid leakage of battery liquid which
may cause damage to the device.
*Be care about the polarity of the battery when replacing it.

13
*Properly dispose of the used battery to avoid environmental
pollution.
5.2 Device Startup and Shutdown
5.2.1 Device startup
Press ON/OFF key to make the start-up of the device initialized. The
microprocessor in the device gets the position of pupillary distance
pointers and then the data display on the corresponding LCD window.
Now you are able to conduct measurement.
5.2.2 Device shutdown
Press ON/OFF key to turn off the device.
5.3 Measurement of Binocular Pupillary Distance
a. Start-up. The initialized setting of the device is just the binocular
pupillary distance for measuring ∞optic distance.
b. Put the forehead bearer lightly on the testees's forehead, and nose
bearer lightly on testee's nose bridge, then keep the device in a
horizontal state(as shown in Fig.6).
Fig.6
c. Let the testee stare at the green target of the device.

14
d. The tester observes the reflecting light spot on the testee's pupil
through measuring window. Slide the Left and Right Pupils
Measuring Keys, the left and right pupillary distance pointers will
coincide with the reflecting light spots of the testee's left and right
pupils, respectively(as shown in Fig.7a and Fig.7b ). The data shown
in the display window are the measured pupillary distance.
Fig. 7a (The sight the tester observes through measuring window)
Fig.7b (The left and right pointers coincide with the reflecting bright dots)
e. In order to measure the pupillary distance at different optic
distances, please turn the Optic Distance Knob (as shown in Fig.1
NO.2) to your optic distances first and then make your measurement.
This device sets some different optic distance locations such as 30cm,
35cm, 40cm, 50cm, 65cm, 1m, 2m and ∞.
*In the process of measurement (and the measurement of monocular
pupillary distance described in the following section), to achieve
precise data of measurement and make process of measurement

15
easily and quickly, the tester should remind the testee to always stare
at the green target in a level state, without moving his (her) eyeballs.
5.4 Measurement of Monocular Pupillary Distance
a. When needing to measure the left or right pupillary distance,
please turn the Monocular Covering Knob (as shown in Fig.3 B3)
which can cover the other eye completely (as shown in Fig.8a and
Fig.8b)
Fig.8a (Measuring right pupillary distance)
Fig.8b (Measuring left pupillary distance)
b. The tester observes the reflecting bright dot on the testee's pupil
through measuring window. Slide the Left and Right Pupils
Measuring Keys, the left or right pupillary distance pointers will
coincide with the reflecting bright dots of the testee's left or right
pupils, respectively. The datum shown in the display window is just
the measured pupillary distance.
5.5 Measurement of the VD
a. Press F4 Function Transition key (PD/VD) to enter into VD
measurement mode.

16
b. The optician makes inspection standing by the side of the testee,
and the latter is preferably situated against the light. Place the
instrument in the horizontal level (see Fig.9a), and target the guide
mark at the top of cornea of the testee.
c. After targeting is finished. Optician slides left/right pupi1
Measuring key to coincide the Benchmark spring with the top of the
lens (Fig.9b). The distance from the top of the cornea to the mounted
lens can be obtained by deducting the thickness of the lens from the
value digitally displayed at that time.
Fig.9a Fig.9b
5.6 LED and automatic power-off settings
a. Put F3 left pupil measuring keys to the left end and F10 right key
to the left end and keep them there, then press F4 (Function
Transition Key) continuously 5 times till the screen shows image of
“------”. After this, move F10 right measuring key to the right end
and press Function Transition Key again, then we get in the LED
brightness and automatic power-off setting mode.