Do limbal dermoids cause vision loss?
Often. Occassionally the dermoid is so large that it blocks visual input from entering the eye. More often however, the vision loss occurs because the presence of the dermoid causes the cornea of the affected eye to have an irregular shape. This warping of the cornea can cause a large amount of astigmatism and a blurred image. The blurred image encourages the developing brain to ignore the input from the affected eye, thus causing vision loss through amblyopia. Forutunately, amblyopia if detected during childhood can often be successfully treated (amblyopia).
