Use of angle kappa in myopic photorefractive keratectomy
| Autor: | Hamid Khakshoor, Amir Hossein Vejdani, Michael V McCaughey, Ramin Daneshvar, Majid Moshirfar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
medicine.medical_specialty
Refractive error genetic structures PRK medicine.medical_treatment photorefractive keratectomy Ophthalmology Medicine High angle myopia Corneal reflex Monocular Diplopia angle kappa Angle kappa business.industry Glare (vision) Clinical Ophthalmology Purkinje reflex medicine.disease Centration Photorefractive keratectomy eye diseases CSCLR business Rapid Communication |
| Zdroj: | Clinical Ophthalmology (Auckland, N.Z.) |
| ISSN: | 1177-5483 |
| Popis: | Hamid Khakshoor,1 Michael V McCaughey,2 Amir Hossein Vejdani,1 Ramin Daneshvar,1 Majid Moshirfar3 1Department of Ophthalmology, TheUniversity of Mashhad, Mashhad, Iran; 2Department of Ophthalmology, The University of New Mexico, School of Medicine, Albuquerque, NM, USA; 3Department of Ophthalmology, Francis I Proctor Foundation, University of California San Francisco, CA, USA Purpose: To explore utilization of the coaxially sighted corneal light reflex (CSCLR) for centration during myopic photorefractive keratectomy (PRK) for patients with relatively high angle kappa (κ) values.Methods: Patients were stratified into two groups preoperatively, on the basis of angle κ values. Group A was composed of 166 eyes with an angle κ value 5°. Intraoperative centering of ablation was performed within group A by utilizing the pupillary center, and within group B by using the CSCLR. Visual acuities were evaluated and compared at 6 months and 12 months postoperatively between groups.Results: Mean uncorrected visual acuities (UCVA) for all patients at 6 months and 12 months were -0.073 logMAR and -0.080 logMAR, respectively. A total of 98.9% of patients had a UCVA of 0.00 logMAR (≈20/20 Snellen) 12 months postoperatively. There was not a significant between-group difference in regard to residual refractive error at 6 months or 12 months (P=0.53 and P=0.97), or in UCVA at 6 months and 12 months (P=0.76 and P=0.17). There were no subjective complaints of monocular diplopia, glare, or haloes within either group at any time during follow-up.Conclusion: Availing use of the CSCLR for centration of ablation within myopic patients with high angle κ values may aid in providing better refractive outcomes after performance of PRK. Keywords: angle kappa, photorefractive keratectomy, PRK, CSCLR, myopia, Purkinje reflex |
| Databáze: | OpenAIRE |
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