What is Strabismus?
Strabismus is a condition where an eye is turned inwards, outwards, upwards, or downwards. A person with strabismus is often referred to as having a "crossed-eye" (esotropia) or being "wall-eye" (exotropia). Strabismus effects approximately 3% to 5% of the general population. The appearance of the eye turn can be dramatic, often causing parental concern, or it can be hardly noticeable. It can be present only part of the time or all of the time. Although strabismus can develop at any age, most eye turns occur during the first few years of life. Some children develop strabismus shortly after birth while others develop it during their toddler years, with the majority occurring before the age of 6 years. Eye turns can cause a range of complaints, including double vision, decreased vision (lazy eye), eye strain, decreased depth perception, and unusual head postures; although some individuals have no complaints at all. Because of the cosmetic appearance of a strabismus, it can affect a person’s self esteem.

The most important aspect of strabismus is early identification and treatment. Because some eye turns are not noticeable, the AOA recommends all children have their first eye exam by 6 months of age (Pediatric Vision Care Service). This allows for identification of strabismus or risk factors that might lead to strabismus in the future. If the examination findings are normal then the next examination should be scheduled when the child is 3 years of age. If the findings are significant or there are risk factors such as a family history of strabismus or developmental delays (e.g., Down syndrome or cerebral palsy) then the examinations should be scheduled on a more frequent basis. Left untreated, eye turns can lead to a loss of vision, affect school performance, reduce productivity at work, and impact career choices.

Early identification leading to early treatment increases the possibility of a good outcome (Strabismus/Amblyopia Evaluation). Some types of strabismus can be treated with glasses alone while others require treatment beyond glasses. Treatment may include prisms, occlusion (patching), vision therapy, surgery, or a combination. Vision therapy works by developing the brain’s ability to use both eyes simultaneously. Surgical treatment physically moves the muscles to new locations in an attempt to mechanically straighten the eye. Which treatment may be best for you or your child can be determined by your eye care provider after a thorough vision assessment.


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