Test presentation on a high-resolution colour display
Visual acuity test
- Landolt C conform to DIN EN ISO 8596
- Tests include numbers, letters, tumbling E and ETDRS charts. Child-friendly picture optotypes are optional.
- Levels of visual acuity: 2/400, 20/200, 20/100, 20/63, 20/50, 20/40, 20/32, 20/25, 20/20, 20/16, 20/12.5, 20/10
- Optional presentation of single optotypes
Colour perception test
- Large selection of colour test plates
- Video display precisely calibrated to colour temperature for optimal colour reproduction
- Presentation time of colour plates can be limited for improved test accuracy
- Colour test plates for children (optional)
These binocular tests are generated via a modern LCD shutter system which imitates natural vision. A variety of integrated stereo and phoria tests allow a
quick screening of binocular functions.
- Optional: Additional child-friendly, easy-to-grasp stereo and phoria test charts*
The astigmatism chart and the red-green test allow fast screening for significant refraction errors.
Vision testing device for contrast vision, mesopic vision and glare sensitivity
Contrast vision test
Similarly to visual acuity tests, photopic contrast tests are conducted against a high intensity background light. Unlike visual acuity testing, where test
characters are presented in high contrast, in photopic contrast vision testing, the contrast is reduced in stages. Contrast vision can optionally be tested with
all available optotypes e.g. Landolt C, letters or numbers at different visual acuity levels.
Mesopic vision and glare sensitivity test (optional)
Visual performance varies according to lighting conditions. To test visual function under mesopic conditions, a Landolt C of different contrast
levels is presented in an environment of low light density, as it occurs during night driving. Additionally, glare sensitivity can be tested by simulating the dimmed light of an approaching vehicle.
Determination of accommodation amplitude
Determination of the accommodation amplitude can be a valuable tool in deciding whether specific VDU workstation glasses are needed. The Duane
test figure in combination with a kinetic process is particularly suitable for determining the accommodation amplitude. Results are determined quickly
Effect of corrective lenses
In the event of abnormal visual acuity values or asthenopic symptoms the effect of corrective lenses can be simulated in the range from +4.5 D to -3.5 D. This allows testing for latent hyperopia, age-related presbyopia or myopia, in particular night myopia
Peripheral visual field perception
Perception is tested at 7 points each for the right and left field of vision. Unique feature: The check of fixation proceeds through symbols changing
in the center. By checking these symbols a fixation test is obtained.