Related Experiment Videos
Central bump-like opacity as a complication of high hyperopic photorefractive keratectomy
Z Z Nagy1, R R Krueger, I Süveges
1First Department of Ophthalmology, Semmelweiss Medical University, Budapest, Hungary.
Purpose:
A new complication is reported in association with high hyperopic excimer laser photorefractive keratectomy.
Methods:
One thousand consecutive eyes were treated with a Meditec MEL-60 excimer laser (Meditec Inc, Heroldsberg, Germany) for hyperopic refractive error between +1 diopters and +7 diopters.
Results:
Three eyes with high hyperopic corrections between +5 and +6 diopters had a central, round bump-like subepithelial scar develop 1 month after hyperopic photorefractive keratectomy, which reduced the uncorrected and spectacle-corrected visual acuity.
Conclusion:
Central bump-like opacity is a new, visually significant complication of unknown origin associated with high hyperopic photorefractive keratectomy. Possible causes of this complication include drying and edema of the cornea as a result of prolonged exposure, interruption of the peripheral superficial nerve plexus affecting the central anterior stroma, and abnormal epithelial or tear film function resulting from excessive central steeping.