| Description | Designed by DG Pelli, JG Robson and A J Wilkins, because they see contrast sensitivity as a realistic assessment of how well the patient sees large faint objects. The chart follows the luminance, font, and letter spacing recommendations of the | Designed as a simple screen test. The usual question for a reading test is: "What is the smallest (black) line you can read?" On the contrast card one adds the question "What is the smallest (grey) line you can read?" The difference between the two | Uses - Establishing baseline contrast sensitivity prior to and after an intervention(such as cataract extraction, LASIK, or other refractive surgery)
- Identifying functional losses in low contrast perception (often associated with
| Developed by Jeff Rabin, OD, PhD,US Air Force School of Aerospace Medicine This Super Vision test includes visual acuity and letter contrast sensitivity (CS) on a single chart. The top portion of the chart tests for acuity vision while the bottom | This contrast sensitivity flip book includes a series of seven contrast levels for accurate and precise vision testing. This levels decrease throughout the test beginning with acuity, 25%, 10%, 5%, 2.5%, 1.25% and ending with .06%. The use of several |
| Features | - Features Traditional Sloan Optotypes
- For use at 40 in (1m)
- Includes two charts and two scoring pads
- Illumination of 85 cd/m² is key to good results
| - Mixed high-contrast and 10% contrast
- Unrelated simple sentences at 4th grade level
- Serves as an educational tool to demonstrate the effect of contrast deficits to patients and family members.
- Multi-distance testing
- Acuity range 10m to 0.6m in Times Roman Font (20/320, 6/95 to 20/16, 6/4.8 equiv.)
- Includes test instructions and diopter ruler
- Measures 43 x 38 cm (17 x 11 in.)
- Folds in half to 21.5 x 38 cm (8.5 x 11 in.)
- Also available in various languages
| - Three charts, for the left eye, right eye and binocular testing, or for repeated testing without letter sequence memorization
- Rapid administration, with easy, accurate scoring
- Easy to store and protect
- Easy to illuminate (e.g., with instrument stand lamp)
- Each chart mounted on durable plastic
- Designed for near testing (40 or 50 cm)
- Low cost
| - Super vision test is designed for use at 4 meters (13 feet, 1.5 inches)
- Notations are printed on the chart in LogMAR 0.2 to -0.6 on the top half of the chart
- On the bottom half notations are printed in LogCS with a letter size of 5M, 4/5, 13/16.5 (6/7.5, 20/25 equiv.)
- High contrast VA (20/32 to 20/5 log MAR scale; 20/5 is 4x smaller than 20/20)
- Used by branches of the US Armed Forces
| - Notations for testing at 1 meter (40 in.)
- Acuity range 20M to 1.6M (20/200, 6/120 to 20/32, 6/9.5 equiv.)
- Contrast varies by page: full contrast, 25% , 10%, 5%, 2.5%, 1.25%, and .06%
- Spiral bound
- Test includes a soft-tipped pointer, 1 mater cord, recording forms (CAT. NO. 2514) and instructions
- Measures 36 X 36cm (14.25 X 14.25 in.)
- Traditional Sloan Optotypes
- Uses different optotype combinations for each level to prevent undesired memorization
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