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Ophthalmic Technician

Category - Visual Assessment

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Assessment of contrast sensitivity is NOT done by which of the following methods?

The Arden gratings
The Vistech chart
The Pelli-Robson letter sensitivity chart
The Snellen’s chart

Explanation

Answer: D - Assessment of contrast sensitivity is NOT done by the Snellen’s chart.

The Snellen’s chart is used for measurement of visual acuity(form sense only) and does not assess the contrast sensitivity. Letters on the Snellen’s chart can be read even by an individual with poor contrast sensitivity.

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