Description Test No. 1, SF-1 — Binocularity Both Eyes To determine whether both eyes are being used together. Test No. 2, SAB-1 — Acuity Both Eyes This psychologically sound pattern of Landolt Rings provides a precise measure of acuity with literates or illiterates. Easy to administer. The test symbol to be identified is the unbroken ring. Test No. 3, SAR-1 — Acuity Right Eye Same as Both Eyes except Landolt Ring symbols are omitted from left eye area. Permits measuring the habitual functioning of the Right Eye while both eyes look at the slide. Test No. 4, SAL-1 — Acuity Left Eye This slide is similar in principle to that used for the Right Eye. Test No. 5, SSD-1 — Stereo Depth Is a precise measure of one of the important factors of depth perception. The reliability of test results is high. It provides an excellent measure of binocular skill. Easily administered. Test No. 6, SCD-1 — Color Perception Consists of six accurately and authentically reproduced Ishihara Pseudo-Isochromatic plates. Detects color deficiency, but does not classify. Test No. 7, SVP-1 — Vertical Phoria Measures vertical balance between the two eyes. Good vertical alignment is an important factor in comfortable, efficient, two-eyed vision and is related to efficiency in most occupations. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Test No. 8, SLP-1 — Lateral Phoria Desirable Phoria scores are associated with quick, accurate eye fixations and precise, effortless seeing. Acuity results calibrated at 20/13, 20/15, 20/17, 20/18, 20/20, 20/22, 20/25, 20/30, 20/35, 20/40, 20/50, 20/70, 20/100 and 20/200.
