Differences in nasal and temporal responses of the cornea after photorefractive keratectomy

Sebastiano Serrao, Giuseppe Lombardo, Marco Lombardo

Research output: Contribution to journalArticlepeer-review


Purpose: To examine the differences in the biomechanical response of the peripheral regions of the cornea after photorefractive keratectomy (PRK). Setting: Department of Ophthalmology, Catholic University of Rome, Rome, Italy. Methods: Preoperative and 1-, 3-, 6-, and 12-month postoperative corneal topographies of 70 eyes that had PRK with the Technolas 217C excimer laser (Bausch & Lomb) were obtained. The eyes were divided into 4 groups according to the preoperative spherical equivalent refraction. Preoperative and follow-up topographic data were imported into custom software that computed the average composite corneal map and difference maps in each group to scientifically evaluate the corneal response to the surgery. The software was also used to analyze regional corneal changes after the laser ablation. Corneal peripheries up to 9.0 mm were evaluated. Results: The preoperative corneas had a flatter nasal periphery than temporal periphery. The corneal surfaces in the right eyes and left eyes showed a mirror symmetry. Significant differences in the regional response of the cornea were observed (P

Original languageEnglish
Pages (from-to)30-38
Number of pages9
JournalJournal of Cataract and Refractive Surgery
Issue number1
Publication statusPublished - Jan 2005

ASJC Scopus subject areas

  • Ophthalmology


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