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The CSV-lOOOCVA20/30 test face provides three contrast levels (high, 9.5 and 6) of LogMAR acuity from 20/16 to 20/100. This test is designed to detect very subtle changes in vision, such as associated with contact lens evaluation or due to refractive surgery. The upper two rows of the test provide the same contrast and acuity levels as the lower two rows; different groups of letters are used in these sections so that each section can be used to test the different eyes.
Patients should have 20/30 or better vision to be evaluated with this test face. If patient vision is worse than 20/30 visual
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April 24, 2009
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The CSV-lOOOETDRS10 test face presents the standard ETDRS test at a contrast level of 10. This test is widely used in clinical studies for the evaluation of refractive surgery and contact lenses.
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Date:
April 24, 2009
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Contrast Sensitivity Test Faces
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Date:
April 24, 2009
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The CSV-1000-1.5CPD is a special test face designed specifically for Food and Drug Administration clinical trials.
At the recommended test distance of 8 feet, the gratings test one spatial frequency of 1.5 cycles/degree.
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Date:
April 24, 2009
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The CSV-lOOOCVA test face is used to evaluate both contrast sensitivity and low contrast acuity.
Three contrast levels (high, 25 and 12.5) of LogMAR acuity (20/16 to 20/100) are presented on the test face as well as the two spatial frequencies of 6 and 12 cycles/degree.
This test is most widely used for cataract documentation because eye doctors can document cataract vision loss with both types of tests. When using the low contrast acuity portion of the test for evaluating cataract patients, the 12.5 contrast level is recommended.
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Date:
April 24, 2009
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The CSV-lOOOCVA test face is used to evaluate both low contrast acuity and contrast sensitivity. Three contrast levels (high, 25 and 12.5) of LogMAR acuity (20/16 to 20/100) are presented on the test face as well as the two spatial frequencies of 6 and 12 cycles/degree. This test is most widely used for cataract documentation because eye doctors can document cataract vision loss with both types of tests. When using the low contrast acuity portion of the test for evaluating cataract patients, the 12.5 contrast level is recommended.
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Date:
April 24, 2009
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The CSV-1OOOE contrast sensitivity chart test face is the most widely used contrast sensitivity test in the world. This test provides for four (4) rows of sine-wave gratings. At the recommended test distance of 8 ft (2.5 meters), these gratings test the spatial frequencies of 3, 6, 12 and 18 cycles/degree. The CSV-1OOOE provides a full contrast sensitivity curve, which is very useful for the evaluation of ocular disease (particularly cataracts, glaucoma, optic neuritis, diabetes and macular degeneration), contact lenses and refractive surgery. For cataract evaluation/documentation, a functiona
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Date:
April 24, 2009
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The CSV-1000RS test face is used widely for screening refractive surgery patients. The test presents ETDRS LogMAR acuity from 20/10 to 20/100 and one row of spatial frequency at 12 cycles/degree.
The patient can be easily screened in the examination chair for ETDRS acuity and contrast sensitivity. If a contrast sensitivity deficit is found, retesting the patient with all four spatial frequencies using the CSV-1000E is recommended.
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Date:
April 24, 2009
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The CSV-lOOOSLanC test face provides the same tests as the standard CSV-1OOOS, except that the acuity test is presented in Landolt C format.
This test is very useful when testing patients who cannot read the English alphabet.
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Date:
April 24, 2009
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The CSV- lOOOLanC 10 test face is a LogMAR acuity test which uses the Landolt C in various orientations for the test targets. The targets are presented at 10 contrast. The test is very useful for evaluating the low contrast acuity of illiterate or non-English speaking patients.
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Date:
April 24, 2009
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