Hashemi Sh, Khanlari M, Mamishy Zh,
Volume 58, Issue 2 (7 2000)
Abstract
Accurate measurement of refractive error in uncooperative patients and young children, requires cycloplegia. The aim of the present study was to determine whethere cyclopentolate by itself or in combination with 4 times instillation of atropine can be used as a substitute for 10 times instillation of atropine. From 1994 to 1996, 39 patients aged 2-12 years were included in this study. Cycloplegia was undertaken by four different methods in subsequent visits: cyclopentolate 1%, 4 times instillation of atropine, 10 times instillation of atropine plus tropicamide and 10 times instillation of atropine. 26 patients (53% male, mean age: 6.4 years) completed the four stages of the study. Spheric refraction was significantly different between cyclopentolate and 4 times and 10 times atropine groups, but we didn't find any significant difference in cylindric refraction between groups. It seems that 10 times instillation of atropine is still the best method of cycloplegia in pediatric eye examination.
Hashemi Sh, Fatehi F,
Volume 58, Issue 3 (7 2000)
Abstract
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.
