نتایج عمل Photorefractive keratectomy برای درمان نزدیک بینی زیاد در کلینیک نور تهران
نویسندگان
چکیده مقاله:
Many studies have shown the effectiveness of photorefractive keratectomy (PRK) in correction of vision in low and moderate Myopia. To evaluate the results of 193-nm exeimer laser photorefractive keratectomy for highly Myopic eyes, we reviewed refractive outcome of 43 eyes of 30 patients. Most eyes were treated with 1-step operation, using a 6 mm optical zone. 43 eyes were treated for Myopia, which were between -6.40 and -16.90 diopters. The mean pre-operative refraction was -9.50 D. All eyes were followed for at least 12 months. At 12tht month visit, 30.2% and 60.5% of eyes achieved correction within 1 and 2 D of attempted correction, respectively. At this time, 62.7% of eyes obtained 20/40 visual acuity or better uncorrected. At 1 year, 13% and 8% of eyes lost 3 and 4 lines of best-corrected visual acuity, respectively. Also 13% of eyes lost 2 lines. 12 months after PRK, 5 eyes developed corneal haze grade 2 and 2 eyes, grade 3 (0-5 scale). There was much undercorrection seen in this group compared with patients undergoing PRK for low and moderate Myopia. Photorefractive keratectomy for high Myopia, though effective, is not a safe and accurate procedure and is less predictable and stable than performing it for low and moderate Myopia.
منابع مشابه
Photorefractive Keratectomy in Keratoconus
PURPOSE To assess the efficacy and safety of topography-guided photorefractive keratectomy (PRK) for keratoconus and to estimate the subsequent risk of progression. METHODS This is a retrospective follow-up study. Between 1998 and 2013, 28 eyes of 23 patients (age 17-60) with grade 1-3 keratoconus received topography-guided PRK. Corrected-distance visual acuity (CDVA), keratometry, pachymetry...
متن کاملCorneal 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 کاملChoroidal neovascularization following photorefractive keratectomy
PURPOSE To describe a case of choroidal neovascularization (CNV) following photorefractive keratectomy (PRK) to correct myopia. METHODS We performed PRK in both eyes of a 20-year-old girl to correct myopia. Refractive error was -4.75 -2.25 × 5 in the right eye and -5.00 -1.25 × 180 in the left eye. Metamorphopsia was noticed by the patient in the right eye one month after the surgical procedu...
متن کاملTransepithelial photorefractive keratectomy: clinical results.
PURPOSE To assess the effectiveness, safety, and comfort of transepithelial photorefractive keratectomy (PRK) using the Amaris laser platform. SETTING Ophthalmic Consultants of Beirut, Jal-El-Dib, Metn, Lebanon. DESIGN Comparative case series. METHODS Myopic eyes with or without astigmatism were treated by transepithelial PRK (study group) and compared with variable-adjusted eyes treated ...
متن کاملRefractive regression after photorefractive keratectomy.
To the Editor: We thank Drs. Talamo and Abad and Mr. Lim (Refractive Regression after Excimer Laser Photorefractive Keratectomy. J Refract Surg 1996;12:757[letter]) for their comments and are gratified that their findings support our hypothesis that the refractive regression after photorefractive keratectomy (PRK) is not a result of the thicker regrowth of connnective tissue or epithelium in th...
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عنوان ژورنال
دوره 58 شماره None
صفحات 24- 28
تاریخ انتشار 2000-06
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