In March 1999, a 35-year-old woman had uneventful laser in situ keratomileusis in both eyes on the same day. Five days postoperatively, slitlamp biomicroscopy of the left eye showed an appearance similar to haze after photorefractive keratectomy, with greater density at the center and striae convergent toward the infiltrate (stage 4 diffuse lamellar keratitis [DLK]). The patient received treatment with dexamethasone 0.2% eyedrops every 2 hours. After 2 weeks, visual acuity was better and improvement was evident on topography, pachymetry, and slitlamp photography. The improvements were more marked at 6 months and 1 year. There was a progressive increment in corneal thickness and consequent improvement in corneal transparency, curvature, and regularity. This case, in which continuous morphologic adaptation of the cornea occurred, indicates that observation, rather than intervention, is a valid therapeutic option for stage 4 DLK.
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