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Dr, Laura A. Syniuta, M.D. 2865 Atlantic Ave., Suite 109 Long Beach, CA 90806 USA |
Dr. Jotterand & Dr.Syniuta: Helping you with your vision since 1986 phone: (562) 988-2020 |
Veronique H. Jotterand, M.D., FRCSC 2865 Atlantic Ave., Suite 109 Long Beach, CA 90806 USA |
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Strabismus (from Greek: στραβισμός strabismos, from στραβίζειν strabizein "to squint," from στραβός strabos "squinting, squint-eyed" [1]) is a condition in which the eyes are not properly aligned with each other. [2] It typically involves a lack of coordination between the extraocular muscles that prevents bringing the gaze of each eye to the same point in space and preventing proper binocular vision, which may adversely affect depth perception. Strabismus can be either a disorder of the brain coordinating the eyes or a disorder of one or more muscles, as in any process that causes a dysfunction of the usual direction and power of the muscle or muscles.
During eye examinations, ophthalmologists, orthoptists, and optometrist typically use a cover test to aid in the diagnosis of strabismus. If the eye being tested is the strabismic eye, then it will fixate on the object after the "good" eye is covered, as long as the vision in this eye is good enough. If the "good" eye is being tested, there will be no change in fixation, as it is already fixated. Depending on the direction that the strabismic eye deviates, the direction of deviation may be assessed. Exotropic is outwards (away from the midline) and esotropic is inwards (towards the nose).
A simple screening test for strabismus is the Hirschberg test. A flashlight is shone in the patient's eye. When the patient is looking at the light, a reflection can be seen on the front surface of the pupil. If the eyes are properly aligned with one another, the reflection will be in the same spot of each eye. Therefore, if strabismus is present, the reflection from the light will not be in the same spot of each eye.
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| Esotropia |
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