Potential Acuity Meter Instructions
Test: Retinal visual acuity
Interference fringe visual acuity
Potential visual acuity
Model: PAM-1
PAM-2
1
Catalogue
Introduction............................................................................................3
General safety requirements................................................................. 3
Attention.................................................................................................3
Ⅰ.Brief Introduction............................................................................. 3
Ⅱ.Part Name.........................................................................................4
Ⅲ.Operation and Usage........................................................................4
Ⅳ.Maintenance.....................................................................................5
Ⅴ.Troubleshooting Guide.....................................................................5
Ⅵ.Responsibility....................................................................................6
Ⅶ.Transportation and Storage............................................................. 6
1、Transportation:.......................................................................... 6
2、Storage:...................................................................................... 6
Ⅷ.Main Specifications and Parameters............................................... 6
Ⅸ.Additional Information.....................................................................7
2
Introduction
Thanks for your purchase of our potential acuity meter. For using the instrument
better, please read this instructions carefully before usage.
General safety requirements
Please read the following notes in detail in avoide of damage and the potential
risk.
Attention
1.Don not use the instrument in inflammable, explosive, heat and dust
environment. It should be used indoors. Keep the product clean and dry.
2.Check if install two No.2 or No.5 batteries.
3.Don not touch the surface of optical elements with hands or hard matter.
4.When no use of the instrument, cover the dustproof cover.
5.If there is a fault, please read troubleshooting guide. If the fault has not been
solved, please contact our authorized dealer or our own maintenance department.
Ⅰ.Brief Introduction
PAM-1、PAM-2 potential acuity meter(or called retinal visual acuity, interference
fringe visual acuity) used for test potential vision addressability. It is available for
visual inspection of relevant department such as community medical instrument,
hospital and so on.
According to the principle of interference, coherent monochromatic light can
produce interference fringes. These images can be the sighting mark to test the
3
vision. The vision examined by this sighting mark called Interference Fringe Visual
Acuity (IVA), also known as potential visual acuity or retinal visual acuity.
This instrument will not be influenced by dioptric system on the maximum limit.
The instrument is useful for forecasting the post-operative visual acuity of
cataract. It is the preoperative conventional testing instrument for extraction of
cataract and intraocular lens implantation. It can also be the auxiliary testing
equipment for retinal detachment, macular hole, penetrating cornea transplantation
and preoperative prediction of glaucoma postoperative visual function recovery. And
it has application value in the evaluation and guidance of amblyopia treatment
effect.
Ⅱ.Part Name
6. Display screen 3. Viewport of Sighting mark
5. Direction Wheel
4. Vision wheel
1. On-off knob
2. Hand shank
Ⅲ.Operation and Usage
1.Press the ①on-off knob on the hand shank to open the background light
source.
2.The eye of the person by check should be in front of the ③Viewport of
Sighting mark. The sighting mark issued by the instrument and the pupil should be at
4
the same level. When the person can see the sighting mark consisted of interference
fringe, then the test can start.
3.Turn ④vision wheel to the gear of 0.06, then turn ⑤direction wheel, let the
person answer the direction of fringe.
4.If answer correctly, turn the vision wheel to the next gear(0.1), till to the gear
of 0.8. If wrong, the test finished. The indicated value of last gear is the vision acuity
of the person.
5.In order to find the position of pupil accurately, the instrument show the
position of pupil with display screen. It aimed correctly if the pupil is in the middle
position of the screen.
Notes:
1.Show the person who is sighted with the Demo card attached in the instrument.
Tell them that the image he will see is as shown in the Demo card.
2.The instrument has the device of shut down the light source automatically.
When the instrument is not in use, the light source will cut off automatically.
Ⅳ.Maintenance
The outer plate of the instrument can be cleaned by soft cloth or wet soft cloth.
Ⅴ.Troubleshooting Guide
If there is trouble, press the examine button for guidance. If the fault has not
been solved, please contact our authorized dealer or our own maintenance
department.
Trouble Possible Reason Solution
5
Wipe gently by medical
cotton ball，then wipe
Vague sighting
Dirty projection entrance with clean cotton ball
mark
dipped in medicinal
alcohol
The checkees
The eye is not aim to the Adjust the position of
can’t see the
instrument head
sighting mark
The checkees
can’t see the Run out of batteries Replace the batteries
sighting mark
Ⅵ.Responsibility
According to the maintenance requirement of clients, we can provide the
maintenance information related to the instrument. If need the related information,
service or have other question, please contact us or our authorized dealer.
Ⅶ.Transportation and Storage
1、Transportation:
Please pay attention to moistureproof and avoid violent vibration.
Relative humidity: 10%-90%
Environment temperature: -25-40℃
2、Storage:
A well-ventilated room without corrosive gas.
Relative humidity: 10%-80%
Environment temperature: -10-40℃
Ⅷ.Main Specifications and Parameters
6
Measurement range: 0.06, 0.12, 0.30, 0.50, 0.60, 0.8(same as the visual chart
divided into 6 gears)
Optical grating: 0°, 45°, 90°, 135°
View direction: No less than 5°
Retinal illuminance: No less than 5Lux
Power supply: Two No.5 batteries
Light source: LED
Volume: 250*60*40mm
Weight: 250g
Ⅸ.Additional Information
1.Hold the handle and turn ①on-off knob according to the sign. If the indicator
light goes on, it means the background light turns on.
2.Press the power switch on the display screen. Press the corresponding part of
⑥display screen, than the image can be magnify and shrink.
Magnify
Shrink
7
3.The eye of the person by check should be in front of the ③Viewport of
Sighting mark. Forehead lean on the position of top of the viewport. The sighting
mark issued by the instrument and the pupil should be at the same level. When the
person can see the sighting mark consisted of interference fringe, then the test can
start.
4.Turn ④vision wheel to the gear of 0.06, then turn ⑤direction wheel, let the
person answer the direction of fringe.
5.If answer correctly, turn the vision wheel to the next gear(0.12), till to the gear
of 0.8. If wrong, the test finished. The indicated value of last gear is the vision acuity
of the person.
Notes:When no use of the instrument, turn off the switch on the handle and display
screen.
Registered standed: YZB/Zhejiang Wenzhou0188-2014
Wenzhou Raymond Photoelectricity Tech.Co.,Ltd
Add: Room303, Zhongshi Building, No.10 area, high-techzone, Wenzhou, Zhejiang,
China
Pc: 325011
Tel: 0577-86580028
Fax: 0577-86580028
8
