Traditional visual acuity charts have several problems. They are designed for use just at a certain distance. Usually the brightnes of chart is not controled. In addition, in many of charts with backlight, the backlight is not uniformly distributed and they are bulky and heavy. Other problems of these charts may be the possibility of memorizing the direction of letters by the patient because the direction of letters in these charts are fixed. Furthermore, the optotypes of printed charts can be vanished in some parts and become illegible after a course of time.

In order to overcome these problems, Been Chart offers a wide range of facilities and tests:

Controllable by keyboard, mouse or a special remote control

The screen is calibrated to guarantee optimal and accurate display of optotypes and color targets

Applicable at different distances

Adjustable contrast for optotypes

The optotypes are randomly oriented so that the patient can not memorize the direction of the letters

Multiple line arrangement styles: single optotype, single-line chart and multi-line chart

Defferent VA notation systems: Feet, Metric, Decimal and LogMAR

Several sets of optotypes: Tumbling E, Landolt's C and Lea pediatric symbols

capable of assessing visual psychometric function (V-PMF)

Special charts for vision screenings

Negative mode to assess vision in the low-glare condition

Duochrome Test

Evaluation and prescription charts for stigmatism: Astigmatic Fan Chart, Paraboline Test, Marsden Dots

Binocular vision charts: Worth 4 Dots, Iconometer to evaluate anisoconia, Phoria Test

Color vision tests: Ishihara and D15 (Farnsworth D-15 Hue and Lanthony 15-Hue Desaturated)

Stereo acuity test (TNO)

Various videos for use as a target for pediatric retinoscopy

Approved by Mashhad University of Medical Sciences (MUMS) Registered with the Iranian Patent Organisation (IRIPO)