Hirschberg test

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RAIN HEALTH CARE

1. 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.

2. 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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