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:

Power supply: AC100V to 240V, 50/60Hz

Standard power: Approx. 60W

Standby power: Approx. 2W

Dot pitch of monitor: 0.282mm

Type of monitor: TFT

Size of monitor: 21.5 inch

Ratio of monitor: 16:9

Maximum Screen Resolution:1680x1050/60Hz

Visual size: 476X310mm

Visual angle: H:170/V:160

Color: 16.7M

Max brightness: 300CD/M2

Maximum contrast: 2000:1

Corresponding singal time: 5ms

External dimensions: 504x310x45mm

Unit weight: 5.0KG

Working distance: 1m to 6.5m

Recording methods of vision: Decimal & Imperial fraction

Control distance: not less than 8M for maximum

Installation:  Table support and Wall mount are all included