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21.5 Inch LCD Digital Visual Acuity Chart Optical Testing Monitor Eye Testing Chart Optotype Display

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LCD Visual Acuity Chart

An eye chart is a chart used to measure visual acuity. Eye charts are often used by health care professionals, such as physicians or nurses, to screen persons for vision impairment. Ophthalmologists, physicians who specialize in the eye, also use eye charts to monitor the visual acuity of their patients in response to various therapies such as medications or surgery.

The eye test chart is placed at a standardized distance away from the person whose vision is being tested. The person then attempts to identify the symbols on the chart, starting with the larger symbols and continuing with progressively smaller symbols until the person cannot identify the symbols. The smallest symbols that can be reliably identified is considered the person's visual acuity.

The Snellen chart is the most widely used. Alternative types of eye charts include the logMAR chart, Landolt C, E chart, Lea test, Golovin–Sivtsev table, the Rosenbaum chart, and the Jaeger chart snellen chart.

Technical Specifications:

Input power: AC100V-240V/20Hz/60Hz

Standard power consumption: 25W

Maximum screen resolution: 1440*900

Screen Size: 21.5 inch

Screen ratio: 16:10

Size: 20.8*7*16.9 in

Weight: 5kg

Working distance: 1m to 6.5m

Remote control distance: 8 meters

Recording methods of vision: Decimal & Imperial fraction

Installation: Table support and Wall mount are all included

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Processing time

According your order list. we will supply delivery time .

Commonly is 5-7 work days after we confirm payment

Shipping time

By Express : 3-7 days . Door to door service

By Air : 3-7 days . (the goods arrival at your local air ports

By sea : 30-40 days (the goods arrival at your local sea ports )

PS : by air or by sea, if you need door to door service, please tell us . we will help you checking the extra door to door cost.

How many months warranty do you provide ?
one year

What should I do if the machine have question ?
For ensuring all the items are in good quality, we will test all products before the packages were sent out. Once the machine have some question, please don't worry. kindly send us some images of the situation , Video and machine series, and explain the question in where . we will supply solution to you deal soon.

What should I do if the spare parts is broken in Warranty ?
If in Warranty, some spare parts broken in the Use. kindly supply picture or video , and machine series number .

We will send the spare parts by express to you soon.. and we bear express cost .

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Reach Us
Xiamen City,China
86-137-99759387
- Contact Person: Mr.Tina
- Business Phone: 86-13799759387
- Email: rightway@vip.tom.com
- WhatsApp: 86-13799759387
- Work Time: 8:00-21:00