The following are four types of stereotest.
a. Name the tests. b. Which one(s) give quantitative values for the stereoacuity.
ii. Frisby stereotests. It is a simple quick test using preferential looking. No glasses required. Three plates of 6 mm, 3mm and 1.5mm diameter are supplied providing a range of stereo acuity assessment from 600 to 15 seconds of arc. iii. TNO stereotest. Presented in a book form and consisting of seven individual plates. The use of the red and green spectacles allows for anaglyphic presentation. The first three plates are for screening purposes whilst those remaining enable the practitioner to determine stereo acuity over a parallax range of 480 to 15 seconds of arc. iv. Lang stereotests. Designed for testing stereopsis in children and based on two principles, random dots and cylinder gratings. When seen monocularly no discernible shape is seen, whereas in binocular vision stereoscopic shapes are recognized. No glasses are required.
iii. TNO stereotest. Presented in a book form and consisting of seven individual plates. The use of the red and green spectacles allows for anaglyphic presentation. The first three plates are for screening purposes whilst those remaining enable the practitioner to determine stereo acuity over a parallax range of 480 to 15 seconds of arc. iv. Lang stereotests. Designed for testing stereopsis in children and based on two principles, random dots and cylinder gratings. When seen monocularly no discernible shape is seen, whereas in binocular vision stereoscopic shapes are recognized. No glasses are required.
iv. Lang stereotests. Designed for testing stereopsis in children and based on two principles, random dots and cylinder gratings. When seen monocularly no discernible shape is seen, whereas in binocular vision stereoscopic shapes are recognized. No glasses are required.
Frisby an TNO stereotests give quantitative values for the stereoacuity.
