Bilateral myopic photorefractive keratectomy in a 14-year-old boy (original) (raw)
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Journal of Cataract and Refractive Surgery, 2009
METHODS: This prospective study comprised patients with hyperopia and purely accommodative hyperopic esotropia. A complete ophthalmologic examination was performed preoperatively and 1, 3, and 12 months postoperatively. The examination included uncorrected (UDVA) and corrected (CDVA) distance visual acuities and orthoptic and sensory tests. All patients also had keratometry, pachymetry, and corneal topography assessment before and after treatment. Treatment was performed using a Technolas 217 excimer laser. RESULTS: Thirty eyes of 15 patients (mean age 30.8 years) were treated. Preoperatively, the CDVA was 20/30 or better in all eyes and the mean cycloplegic spherical equivalent (SE) was C3.50 diopters (D). One year postoperatively, the UDVA was 20/30 or better in all eyes and the mean SE was À0.01 D. The mean esotropic deviation for distance vision without correction preoperatively was 8.7 prism diopters. At 1 year of follow-up, 12 patients achieved orthophoria and 3 patients had a reduction in the angle of deviation. There were no intraoperative or postoperative complications. Stereopsis was unaffected by treatment in all patients. CONCLUSIONS: Photorefractive keratectomy was effective in the treatment of purely accommodative esotropia in young adult patients at a follow-up of 1 year. There were no cases of visual acuity loss or complications from the laser treatment.
European Journal of Ophthalmology, 2009
Purpose To evaluate the clinical results obtained with excimer laser treatment of fully refractive accommodative esotropia. Methods Fully refractive accommodative esotropia was corrected in 17 patients with laser in situ keratomileusis (LASIK) and in 3 patients with photorefractive keratectomy (PRK). The mean age of the patients at time of refractive surgery was 18.8 years (range 14 to 24 years). All surgical procedures were performed under local anesthesia. The preoperative and postoperative data were retrospectively analyzed with regards to visual acuity, ocular alignment, and stereopsis. Results The mean preoperative deviation without correction was 18.1Δ for near vision and 13.7Δ for distance vision. After refractive surgery the mean postoperative deviation was 4Δ esophoria at near, and 2.5Δ of esophoria at distance: 10 patients (50%) showed esophoria for both distance and near vision, 2 patients (10%) esophoria only for near vision, and 8 patients (40%) orthophoria for both dis...
Photorefractive Keratectomy for Residual Myopia after Myopic Laser In Situ Keratomileusis
Journal of Ophthalmology, 2017
Purpose. To evaluate the safety, efficacy, and predictability of photorefractive keratectomy (PRK) on the corneal flap for correction of residual myopia following myopic laser in situ keratomileusis (LASIK). Patients and Methods. A retrospective study on eyes retreated by PRK on the corneal flap for residual myopia after LASIK. All eyes had no enough stroma after LASIK sufficient for LASIK enhancement. Data included spherical equivalent (SE), uncorrected and best corrected visual acuity (UCVA and BCVA), central pachymetry, corneal higher order aberrations (HOAs), corneal hysteresis (CH), corneal resistance factor (CRF), and corneal haze. Results. The study included 64 eyes. Before PRK, the mean central pachymetry was 400.21±7.8 m, the mean SE was −1.74±0.51 D, and the mean UCVA and BCVA were 0.35 ± 0.18 and 0.91 ± 0.07, respectively. 12 months postoperatively, the mean central corneal thickness was 382.41 ± 2.61 m, the mean SE was −0.18 ± 0.32 D (< 0.01), and the mean UCVA and BCVA were 0.78 ± 0.14 (= 0.01) and 0.92 ± 0.13 (> 0.5), respectively. The safety index was 1.01 and the efficacy index was 0.86. No significant change was observed in corneal HOAs. Conclusions. Residual myopia less than 3 D after LASIK could be safely and effectively treated by PRK and mitomycin C with a high predictability. This prevents postoperative ectasia and avoids the flap related complications but has no significant effect on HOAs.
Purpose. To evaluate the safety, efficacy, and predictability of photorefractive keratectomy (PRK) on the corneal flap for correction of residual myopia following myopic laser in situ keratomileusis (LASIK). Patients and Methods. A retrospective study on eyes retreated by PRK on the corneal flap for residual myopia after LASIK. All eyes had no enough stroma after LASIK sufficient for LASIK enhancement. Data included spherical equivalent (SE), uncorrected and best corrected visual acuity (UCVA and BCVA), central pachymetry, corneal higher order aberrations (HOAs), corneal hysteresis (CH), corneal resistance factor (CRF), and corneal haze. Results. The study included 64 eyes. Before PRK, the mean central pachymetry was 400.21±7.8 í µí¼m, the mean SE was −1.74±0.51 D, and the mean UCVA and BCVA were 0.35 ± 0.18 and 0.91 ± 0.07, respectively. 12 months postoperatively, the mean central corneal thickness was 382.41 ± 2.61 í µí¼m, the mean SE was −0.18 ± 0.32 D (í µí± < 0.01), and the mean UCVA and BCVA were 0.78 ± 0.14 (í µí± = 0.01) and 0.92 ± 0.13 (í µí± > 0.5), respectively. The safety index was 1.01 and the efficacy index was 0.86. No significant change was observed in corneal HOAs. Conclusions. Residual myopia less than 3 D after LASIK could be safely and effectively treated by PRK and mitomycin C with a high predictability. This prevents postoperative ectasia and avoids the flap related complications but has no significant effect on HOAs.
Pakistan Journal of Ophthalmology, 2021
Purpose: To compare the results of LASIK versus Trans Epithelial Photorefractive Keratectomy (T-PRK) in correcting astigmatic refractive error. Study Design: Quasi experimental study. Place and Duration of Study: Lahore Medicare Hospital from January to October 2018. Methods: One hundred and twenty six eyes of 63 patients, age 18 to 35 years, either gender, presenting with astigmatism were enrolled in this study. Myopes with spherical equivalent (SE) ? -13.0 diopter sphere (DS), hyperopes with SE ? +5.0 DS and astigmatism ? 1.5 D with visual acuity better or equal to 0.3 LogMAR were included. Astigmatic eyes with < 1.5D and with any other ocular pathology were excluded. Refractive status was assessed by Canon Autorefractor and Heine Retinoscope. Average reading of both methods was taken. Patients were divided into two groups (31: LASIK; 32: trans-PRK) by spin of a coin method. Refractive surgery was done in both groups. Data was analyzed by SPSS 20. Normality of quantitative ...