| Description | ETDRS charts use a series of three charts with different permutations of optotypes. ETDRS "Chart 1" is used to test the right eye's acuity. ETDRS "Chart 2," and "Chart R" are used to test the visual acuity in the left eye and both eyes, respectively | This "revised" ETDRS chart incorporates a slight change in difficulty score for each of the ten Sloan optotypes. These difficulty levels were derived from the best corrected visual acuity examinations of 7,420 eyes during the ETDRS study. The | For nearly forty years, Precision Vision has built a reputation of producing the most accurate and most durable vision testing tools available, including vision test charts for visual acuity measurement, ETDRS eye vision test charts, and more. We |
| Features | - For testing at 4 meters (13 ft.)
- Acuity range 40M to 2M (20/200, 6/60 to 20/10, 6/3 equiv.)
- Only standardized format accepted in studies sponsored by the National Eye Institute
- Designed for use in clinical studies and low vision evaluations where accurate, repeatable visual acuity measurements are required
- Lines are of equal difficulty
- Geometric progression in letter size from line to line
- Letter size is only variable
- Measures 62 X 65 cm (24.5 X 25.5 in.)
- Chart fits the ETDRS Illuminator Cabinet CAT. NO. 2425
- Can be wall-mounted
| - For testing at 4 meters (13 ft.)
- Acuity range 40M to 2M (20/200, 6/60 to 20/10, 63 equiv.)
- Measures 62 X 65 cm (24.5 X 25.5 in.)
- Fits ETDRS Illuminator Cabinet CAT. NO. 2425
- Can also be wall-mounted
- Printed on high-impact polystyrene
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