Technique for Measuring Strabismus with Synoptophore – Review

Abstract

Binocular vision is a brain process in which the integration of two retinal images into a single visual perception is achieved. Binocular vision provides a greater field of vision as well as the main benefit, stereoscopic vision. For many years, the Synoptophore has been the standard choice instrument for Orthoptic management. It is used for assessing and treating of ocular motility disorders very reliably. Mechanical or electrical irritation of a retina leads to the projection of the sensation to the same point in the space where it would be projected if the same retinal point was irritated by light. This is the instrument that performs a comprehensive assessment of binocular vision. It provides standard measurements and easy treatments. To measure the range of fusion, it is preferable to start with convergence, gradually turning the arm of the Synoptophore inward and asking the patient if he or she sees a cat with a tail and ears. In conclusion its important for ophthalmologist and optometrists to have a good knowledge of handling the instrument and to get used of its worthiness in orthoptic practice.