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BEST - Dinosaur Version

Item #: BESTD1

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Bernell Evaluation of Stereopsis Test - Dinosaur Version

Glasses-Free Depth Perception Test

This popular glasses-free depth perception test utilizes lenticular technology in order to create a colorful and less expensive depth perception test without the need for red/green or polarized glasses. This technology also allows for color images to improve interest and images that will resist fading over time. It also has several challenges; the key one being apparent motion. If the test were set up like the traditional polarized version, the answer could have been obtained by even a monocular patient by moving the test from side to side to see which image moves; similar to the apparent motion seen in the polarized type tests by closing one eye at a time. In order to prevent such a hint, this test was designed differently. One image in each row appears to be closer and one appears farther compared to the circle in which they are housed. If the test is moved or twisted from side to side (which they are instructed not to do) one can tell which ones are different, but not whether they come out or go in.

The test has two test plates:
Plate #1 features a Dinosaur character which tests gross stereopsis.

Plate #2 features clip-art characters that are divided into two separate tests. Test 1(Rows 1 - 4) tests fine depth perception with range of targets progressing from 400 seconds of arc down to 40 seconds of arc. Test 2 (Rows A - C) test a row at 400 (Row A), 200 (Row B), and 80 (Row C) seconds of arc targets.
• Test is housed in a black vinyl, diploma style booklet.
• The answer key is printed on the back of the booklet.
• Includes instruction manual.

Validation Studies:
Comparison Between the BEST Stereopsis Test and the Stereo Fly Test
Authored by: Shankaran Ramaswamy, BS Optom, PhD; Kathleen O'Leary, OD; Mengli Han, OD; Jack Richman, OD
Published in Volume 7, Issue 3, July 2019 of the Optometry & Visual Performance Journal
To read the study, click here

Comparison of a New, Filter-Free Stereopsis Test (BEST) With the Randot Stereotest in a Pediatric Cohort
Oded Lagstein, MD; Idan Hecht, MD; Irene Anteby, MD
Journal of Pediatric Ophthalmology and Strabismus. 2020;57(2):129-135
To read the study, click here

Booklet Dimensions: 6" x 8"
Booklet Color: Black

Call Toll Free 1-800-348-2225 or (574) 259-2070

Fax to (574) 259-2102 or (574) 259-2103