21 5 Дюймов ЖК-экран Авто остроты зрения таблицей исследования глаз Тестовая
21 5 Дюймов ЖК-экран Авто остроты зрения таблицей исследования глаз Тестовая
21 5 Дюймов ЖК-экран Авто остроты зрения таблицей исследования глаз Тестовая

21 5 Дюймов ЖК-экран Авто остроты зрения таблицей исследования глаз Тестовая


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Цена:300,00 $ - 330,00 $*

Количество:



Описание и отзывы


Трекер стоимости

Месяц Минимальная цена Макс. стоимость
Sep-17-2025 357.73 $* 375.48 $*
Aug-17-2025 354.64 $* 372.13 $*
Jul-17-2025 297.66 $* 312.51 $*
Jun-17-2025 348.77 $* 365.83 $*
May-17-2025 303.64 $* 318.28 $*
Apr-17-2025 342.93 $* 359.75 $*
Mar-17-2025 339.55 $* 356.57 $*
Feb-17-2025 336.42 $* 353.70 $*
Jan-17-2025 333.38 $* 350.11 $*

Характеристики



Features
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.


Specification


 Electrical source
AC100V~240V/50HZ/60HZ
Rated power
45W
Standby power
2W
Screen resolution ratio
1440*900@60hz
Dot pitch
0.284mm
Screen ratio
TFT
Screen type
16:9
Screen size
19”
Visible angle
408.24mm*222.15mm
Visible size
16.7M
Max.Brightness
300cd/m2
Max.contrase ratio
2000:1
Signal response time
5ms
Product size
460*355*200mm
Net weight
6.2kg


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