Improvement of viual function with glare teting after photorefractive keratectomy and radial keratotomy Original Reearch Article

PURPOE: To evaluate the effect of a glare ource on viual function in patient after photorefractive keratectomy and radial keratotomy. METHOD: Thirteen patient (22 eye) who underwent photorefractive keratectomy and 20 patient (40 eye) who underwent radial keratotomy were evaluated in thi cro-ectional tudy. LogMAR viual acuity and contrat enitivity were meaured. Pupil were meaured with the Roenbaum card. A halogen/tungten glare ource approximated the luminance of headlight of an oncoming car at 100 feet. REULT: In the photorefractive keratectomy and radial keratotomy group, pupil were ignificantly maller (P < .01) and the pupillary clearance of the ablation zone in photorefractive keratectomy and the clear zone in radial keratotomy were ignificantly larger under the glare condition (P < .01). In the photorefractive keratectomy group, viual acuity and contrat enitivity under the glare condition were ignificantly higher than in the no-glare condition (P = .02). In the radial keratotomy group, contrat enitivity under the glare condition wa ignificantly higher than under the no-glare condition (P= .001 to .003). CONCLUION: After photorefractive keratectomy or radial keratotomy, the traditional glare ource contricted the pupil and partially maked the optical aberration, which reulted in an improvement in viual function. A “pupil-paring” aberration tet i needed for evaluation of viual function after refractive urgery.