TNO Occupational vision testing slides for Titmus Model V4
, and V2
Vision Screeners are included as a package (above) with your new vision screener instrument, or are available individually.
The TNO Test Slides, developed by the renowned TNO Human Factors Research Institute in the Netherlands, are a set of new slides for testing visual acuity. Advantages of testing include: The TNO test is based on ISO standards (1994, defines how many objects for each acuity level, spacing between objects and spacing between lines). The test provides equal steps for visual acuity (geometric progression). Instruction is made easier with the TNO test (where is opening of ring?) and the chance of guessing is greatly reduced. The new white background of the TNO test is designed to reduce possible effects on visual acuity.Slide 18070
(Test No. 1, SF-1) for binocularity in both eyes is used to determine whether both eyes are being used together.Slide 18090
(Test No. 2, TNO-B) is used to test visual acuity in 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 indentified is the unbroken ring.Slide 18092
(Test No. 3, TNO-R) is used to test visual acuity in the right eye. Same as Both Eyes 18090, 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.Slide 18091
(Test No. 4, TNO-L) is used to test acuity in the left eye and is similar in principle to that used for the Right Eye 18092 described above.Slide 18087
(Test No. 5, SSD-1) 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 and is easily administered.Slide 18071
(Test No. 6, SCD-1) is used to test color perception, and consists of six accurately and authentically reproduced Ishihara Pseudo-Isochromatic plates. Detects color deficiency, but does not classify.Slide 18089
(Test No. 7, SVP-1) 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.Slide 18073
(Test No. 8, SLP-1) measures lateral phoria. Desirable phoria scores are associated with quick, accurate eye fixations and precise, effortless seeing.
Visual Acuity results calibrated at 20/10, 20/15, 20/20, 20/25, 20/30, 20/40, 20/50, 20/70, 20/85, 20/100, 20/150, and 20/200.