A toe-brake completely locks the caster wheels to prevent a chair from rolling. Recommended for precise hand tasks. Also used for children and disabled people.
Clinical Trial Items, Ophthalmic Clinical Research
Jackson Cross Cylinder ( 0.25, 0.50 and 1.00 )0 out of 5(0)
Hand Held Jackson Crossed Cylinder is mounted on a knurled handle, making it easy to flip.SKU: 7021 7022 7023
Near Vision Chart, Ophthalmic Clinical Research
Colenbrander Reading Card (Low Vision, Mixed Contrast) – EnglishNear Vision Chart, Ophthalmic Clinical Research
Colenbrander Reading Card (Low Vision, Mixed Contrast) – English0 out of 5(0)
Continuous text cards simulate everyday tasks and activities that patients may encounter, such as reading the newspaper.
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 measurements will be obvious and can simply be expressed in lines. Preliminary findings indicate a 2 or 3 line difference is normal.
Unrelated simple sentences at 4th grade level.
Serves as an educational tool to demonstrate the effect of contrast deficits to patients and family members.SKU: 4061_
Ophthalmic Clinical Research, Pelli-Robson Trans-Illuminated Contrast Sensitivity Chart
Trans-Illuminated Contrast Sensitivity Pelli-Robson Chart SLOAN Peak Contrast Sensitivity – Chart AOphthalmic Clinical Research, Pelli-Robson Trans-Illuminated Contrast Sensitivity Chart
Trans-Illuminated Contrast Sensitivity Pelli-Robson Chart SLOAN Peak Contrast Sensitivity – Chart A0 out of 5(0)
Pelli-Robson Trans-Illuminated Contrast Sensitivity Chart
The trans-illuminated versions are identical to the original “Gold Standard” Pelli-Robson Contrast Sensitivity Charts. These charts cover ¾ of the original contrast range and are manufactured to the same true log steps and use the same letters and letter sizes as the originals.SKU: 5017A
Contrast Sensitivity, Near Vision Charts, Ophthalmic Clinical Research, Other charts
Rabin Super Vision TestContrast Sensitivity, Near Vision Charts, Ophthalmic Clinical Research, Other charts
Rabin Super Vision Test0 out of 5(0)
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 half includes highly calibrated levels of contrast. Chart includes eight separate contrast levels for the most precise contrast sensitivity test. This eye chart also includes a separate optotype sequence for each eye to reduce memorization possibilities. This test is designed for use with the Small 914 Illuminator Cabinet.SKU: 2128