| Description | Patti Stripe paddles are highly useful for testing the contrast sensitivity of children, infants, and those with mental disabilities. The contrast sensitivity is tested by placing the gray paddle in front and the grated paddle behind and sliding it | Test Includes CAT. NO. 2126 Rabin Contrast Sensitivity Test CAT. NO. 2147 Glare Filter CAT. NO. 2148 Low Photopic Filter CAT. NO. 914 Small Illuminator Cabinet CAT. NO. 915 Adjustable Base | This flip book is the smaller version of the Cat. No. 2125. Cat. No. 2180 includes three levels of contrast sensitivity; Acuity, 2.5% and 1.25%. This contrast flip book is great for the use in clinical trials and research studies. It is printed on | 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 | 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 | - Patti Stripes consists of six gratings at 0.3, 0.6, 1.2, 2.4, 4.8 and 9.6 CPCM (cycles per centimeter) along with the CPD (cycles per degree) for the three test distances of 25, 50, and 100 cm (10, 20 and 40 in.) printed on the handle.
- Set includes four paddles, three with gratings printed on both sides and one solid gray face for presentation.
- Extremely durable made from 4 mm plastic
- Can be washed with soap and water or cleaned with alcohol
- These will hold up to years of service
- Measures 17.8 X 32 cm (7 X 12.5 in.)
| - A new contrast sensitivity test comparable to the small letter contrast test
- Detects subtle effects of defocus, low luminance and glare
- 20/50 letter size at 4 meters (13 ft.)
- Log CS increases 0.25 steps per row (0.05 log CS/ letter)
- Includes soft-tipped pointer, recording forms and test instructions
| - For testing at 2 meters (6.5 ft.)
- Each page it's own contrast level at 100%, 2.5% and 1.25%
- Acuity range 20M to 1.6M
- Includes test instructions, recording forms (Cat. No. 2514) and soft-tipped pointer
- Measures 13.5 X 14 in.
| - 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
| - 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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