BY RAIN HEALTH CARE

2. HIRSCHBERG TEST
It gives rough objective estimate of the angle of a manifest squint.
Useful in young or uncooperative patients or when fixation in deviating
eye is poor.

3. PROCEDURE
 HERE the patient is asked to fixate at point light held at a distance of 33cm
and the deviation of the corneal light reflex from the centre of pupil is noted
in the squinting eye.
 Each mm of deviation is approximately equal to 7 degree. (1 degree= 2 prism
dioptre)
 The angle of squint is 15 degrees & 45 degrees when the corneal light reflex
falls on the border of pupil and limbus, respectively.

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