eye diseases/strabismus

Strabismus is the case both eyes do not look parallel. One eye may look inward, outward, upward or downward while the other one is in good order. Eye crossing may be permanent or temporary; it may be on one eye or two eyes alternatively. It may emerge in advances ages too. Its frequency in male and female is equal. It may be genetic but none of the relatives of many patients having strabismus may not have strabismus.

 

 

Both eyes are directed to the same target in normal (double sided) vision. Brain’s vision related part may transform two different pictures coming from both eyes into three dimensional images. Since one eye is crossed in strabismus, 2 different pictures are transmitted to brain. Child’s brain learns to ignore the image coming from cross eye. This lead depth perception to disappear and amblyopia to develop in that eye. If strabismus develops in an adult individual, since the brain already learned to perceive images from both eyes, it may not ignore the image coming from cross eye and diplopia trouble develops.

 

 

The reason why eyes cross could still not be defined completely. 6 muscles surrounding eyeball move the eye. Two muscles pull the eyeball inward and outward and other 4 muscles move the eye upward, downward and rotate on every eye. In order both eyes look parallel to each other, all the muscles in one eye must be balanced and work together with the muscles in the other eye.  

 

Brain controls the movement of eye muscles. Strabismus often discovered in the children having organic problems in the brain. Strabismus may develop after a long time in case of cataract or eye injuries reducing vision of an eye. The most important symptom of strabismus is cross eye. The eye may cross under shiny daylight. Sometimes the child develops a position for his/her head to keep the eyes parallel to each other. Disappearance of depth perception may be another complaint. The most frequent complaint is double vision in an adult’s strabismus.