Reduction of Hyperopia and Astigmatism After Superficial Keratectomy of Peripheral Hypertrophic Subepithelial Corneal Degeneration

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To report the development of progressive hyperopia and astigmatism resulting from peripheral hypertrophic subepithelial degeneration which was treated with superficial keratectomy of the lesion.


Case report.


A patient with peripheral hypertrophic subepithelial degeneration of both corneas was followed up for a 6-year period. During this time, the patient experienced a slowly progressive increase in hyperopia and astigmatism in both eyes. In the left eye, extension of the degeneration paracentrally resulted in significant hyperopia and astigmatism and a best spectacle-corrected visual acuity of 20/70. Superficial keratectomy was performed and resulted in a dramatic reversal of the hyperopic and astigmatic shift and a best spectacle-corrected visual acuity of 20/30+2.


Peripheral hypertrophic subepithelial corneal degeneration can result in progressive flattening of the central corneal topography in the involved meridians. This flattening can induce a significant hyperopic and astigmatic shift in refraction. This refractive change can be reversed with superficial keratectomy to remove the degeneration.

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