Single use sensors
Outer radious: 34mm
Height: 52mm
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Spiro Cardboard Sensor
Single use sensors
Outer radious: 34mm
Height: 52mm
Single use sensors
Outer radious: 34mm
Height: 52mm
Hiding Heidi Low Contrast Face Test are available in 2 different versions:
Double Sided : Four cards printed on both sides in the following Contrast levels: black, 25%, 10%, 5%, 2.5%, and 1.25%.
Single Sided : Seven cards printed on one side in the following Contrast levels: black, 25%, 10%, 5%, 2.5%, and 1.25%.
Cards are 9″ x 9″ (23 cm x 23 cm). Includes instructions.

Stereoacuity depth preception test designed to rapidly test for amblyopia and strabismus in early and non-readers and non-verbal children and adults.
Standardized adult Sloan Letter near vision card with proportionally spaced (logMAR) lines in ETDRS, format; line sizes range from 20/400 to 20/10 (6/120 to 6/3) equivalent.
16 inch, 40 cm testing distance.
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