Compared with patients with classic GCD, those with the superficial variants have more opacities, leading to an earlier age of decreased visual acuity, generally during the second decade of life, and therein an earlier need for surgical intervention. 2 Our patient claimed that her vision began to diminish when she was a teenager. The distinction between the superficial and classic forms of GCD has important clinical therapeutic implications because the superficial variants can be managed successfully by a superficial keratectomy, as in our patient, or by excimer laser phototherapeutic keratectomy 2 ; however, recurrences can occur and there are limits to the amount of acceptable corneal thinning.
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Benz et al. (2003) studied this question.
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