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To the Editor.
—I wish to comment on Dr. David Miller's paper, entitled Contact Lens Induced Corneal Curvature and Thickness Changes (Arch Ophthal80:430-432 [Oct] 1968).Dr. Miller states that the method for determining the extent of epithelial edema was that of sclerotic scatter. He does not specify whether the observation of edema was gross or microscopic, nor does he attempt to quantify the edema present.The main objection is that epithelial edema, except in the advanced stage, cannot be observed by the sclerotic scatter technique, whether observing grossly or microscopically. The recommended method, of course, is that of indirect retroillumination. Indeed, this is the only way to detect small or moderate degrees of epithelial edema (bedewing).The sclerotic scatter technique primarily reveals irregularities in the stromal rather than the epithelial layer of the cornea. What Dr. Miller was viewing was the phenomenon of round edema (gross edema, central
Stacy WE. EPITHELIAL EDEMA. Arch Ophthalmol. 1968;80(6):813. doi:10.1001/archopht.1968.00980050815026