Strabismus is a condition where a patient lacks binocularity or binocular fusion as a result of the eyes not “teaming together” correctly. An example is when you notice someone that has one eye fixated on you while your talking to them while the other eye is looking in a totally different direction whether it be up, down, left, or right. Some people refer this as being a “lazy eye”, but that is not necessarily the case. Amblyopia or “lazy eye” is a condition in which the eye is not capable of seeing 20/20 no matter how good the prescription is for the eye and there is no pathology or disease entity to explain the vision loss. These types of eyes can be rehabilitated to sometimes 20/20 along with functional binocular vision with the use of vision therapy. Only a constant strabismus (eye affected is always turned away) can cause a true lazy eye or amblyopia. In other words different forms of strabismus exist which are as follows. A constants strabismus, and intermittent strabismus and even an alternating starbismus. I will define all three accordingly:
Constant Strabismus: One of the patient’s eyes is always turned in, out, up, and/or down.
Intermittent Strabismus: One of the patient’s eyes sometimes deviates in one of the previously mentioned directions. This especially occurs when the patient is fatigued or tired.
Alternating Strabismus: This is when the patient’s eyes take turns alternating the deviation present between the eyes. In other words, one minute the right eye is deviated and then the next minute the left eye is deviated.
My next blog will be a continuation about this topic but I’ll be discussing ways of treating this condition. If this is noted with your child, have them see an eye care professional immediately as a sudden onset could indicate neurological complications, while a congenital or gradual onset should be treated also right away for a more favorable prognosis. However, strabismus surgery isn’t necessarily the answer, but vision therapy is the answer for a lot of these affected patients.
One of the best methods for protecting the long term health of your eyes is frequent eye tests at your local optometrist.
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I appreciate all your feedback regarding my posts. Please feel free to ask questions about what I post or if you have another eye related topic that you want discussed and I could post that on next blog topic. Otherwise, I’ll keep posting a topic each month to discuss.
Happy New Year to all,
Chad A. Carlsson, OD, FAAO
I always learn something new