Clinical Trial Items, Ophthalmic Clinical Research
SKU : 7021 7022 7023
Jackson Cross Cylinder ( 0.25, 0.50 and 1.00 )
SKU : 7021 7022 7023
Hand Held Jackson Crossed Cylinder is mounted on a knurled handle, making it easy to flip.
Hand Held Jackson Crossed Cylinder is mounted on a knurled handle, making it easy to flip.
The high optical quality lens has red and black axis etching.
| Brands | Precision Vision |
|---|
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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: 5016 -
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BRVT The Berkeley Rudimentary Vision Test
For Visual acuity levels beyond the limit of the letter charts, the common practice is for clinicians to categorize vision according to whether the patient can count fingers (CF) or detect hand motion (HM), but there is no recognized or standard procedures for doing this.
SKU: 4500
