Corneal Aberrations Before and After Photorefractive Keratectomy
نویسندگان
چکیده
منابع مشابه
Corneal ectasia after photorefractive keratectomy.
Two patients developed corneal ectasia after photorefractive keratectomy (PRK). Case 1 had evidence of early keratoconus preoperatively, with manifest refractions of -4.00 +2.50 x 160 (20/20) in the right eye and -7.00 +3.00 x 180 (20/30) in the left eye; thin corneas (472 microm and 441 microm, respectively); and inferior paracentral steepening in the right eye and central steepening in the le...
متن کاملCorneal Regeneration After Photorefractive Keratectomy: A Review.
Photorefractive keratectomy (PRK) remodels corneal stroma to compensate refractive errors. The removal of epithelium and the ablation of stroma provoke the disruption of corneal nerves and a release of several peptides from tears, epithelium, stroma and nerves. A myriad of cytokines, growth factors, and matrix metalloproteases participate in the process of corneal wound healing. Their balance w...
متن کاملEffect of larger ablation zone and transition zone on corneal optical aberrations after photorefractive keratectomy.
OBJECTIVE To evaluate the effects of photorefractive keratectomy on corneal optical aberrations using a 5.5-mm optical zone and a 7.0-mm transition zone. METHODS Videokeratographs of 72 eyes from 47 patients treated for low to moderate (1-9 diopters) myopia were obtained at the preoperative and 1-, 3-, 6-, 12-, and 18-month postoperative examinations. The videokeratoscopy data files were used...
متن کاملComparison of corneal wavefront aberrations after photorefractive keratectomy and laser in situ keratomileusis.
PURPOSE To compare changes in the corneal wavefront aberrations after photorefractive keratectomy and laser in situ keratomileusis. METHODS In a prospective randomized study, 22 patients with bilateral myopia received photorefractive keratectomy on one eye and laser in situ keratomileusis on the other eye. The procedure assigned to each eye and the sequence of surgery for each patient were ra...
متن کاملSimultaneous aspheric wavefront-guided transepithelial photorefractive keratectomy and phototherapeutic keratectomy to correct aberrations and refractive errors after corneal surgery.
PURPOSE To evaluate the results of combined aspheric wavefront-guided transepithelial excimer laser photorefractive keratectomy (PRK) and phototherapeutic keratectomy (PTK) to correct aberrations and refractive errors after radial keratotomy (RK) or keratoplasty. SETTING Sekal Rovigo Microsurgery Centre, Rovigo, Italy. METHODS This retrospective noncomparative consecutive case series compri...
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ژورنال
عنوان ژورنال: Journal of Optometry
سال: 2008
ISSN: 1888-4296
DOI: 10.3921/joptom.2008.53