Measuring Stick 100cm.
LEA GRATINGS are for preferential looking test situations with infants or children and adults with disabilities to determine detection acuity
Designed to rapidly test for amblyopia and strabismus in early and non-readers and non-verbal children& adults.Expanded Random Dot Shapes (500, 250, 125 seconds of arc).
This standardized vision test is designed for amblyopia screening and testing children who have difficulties when tested with the standard near vision card.
16 inches/40 centimeters testing distance.
Stereopsis test combining both butterfly and shapes designed to rapidly test for amblyopia & strabismus using gross thru fine stereopsis (2500 to 20 sec of arc).
This test at full contrast requires discrimination of the direction of long lines, which is a more demanding task than the detection acuity measured with Lea GRATINGS.