Image Based Question-66058

The instrument shown in the picture below is used for testing ?

A. Strabismus

B. Lens opacity.

C. Amount of tear production.

D. Vitreous hemorrhage.

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Correct Answer » A Explanation

Ans;A. Strabismus

The instrument shown in the picture above represents Maddox rod.

The Maddox rod test

• It can be used to subjectively detect and measure a latent, manifest, horizontal or vertical strabismus for near and distance. The test is based on the principle of diplopic projection..

• The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens, which refracts light rays so that a point source of light is seen as a line or streak of light.

• Equipment used:

1. Maddox rod.
2. Small fixation light.
3. Prisms(to assess the degree of deviation)