purpose: to investigate the relationship between higher-order aberrations (hoas) and contrast sensitivity function (csf) in myopes. methods: in this cross-sectional study, hoas and csf were measured in myopic eyes over a 6-mm pupil. pupil diameter was measured in photopic condition. the correlation between hoas and csf was investigated using multivariate linear regression analysis. results: sev...

Journal of Refractive Surgery Volume 16 March/April 2000 ABSTRACT PURPOSE: Photoastigmatic refractive keratectomy (PARK) was studied in a multi-center clinical trial. The Nidek EC-5000 excimer laser was evaluated for its effect on refraction, visual acuity, and safety measures as part of a U.S. Food and Drug Administration (FDA) regulated study. METHODS: Eight U.S. centers enrolled adults with ...

to evaluate long term safety and efficacy of the photo refractive keratectomy (prk) in myopic eyes with thin cornea, this study has been designed. in this retrospective case series study, we included 74 eyes of 38 myopic patients with preoperative central corneal thickness (cct) less than 550 micrometer who underwent for prk surgery prior to 2010 and had 4 years of mean follow up postoperativel...

Background: To determine the association between ocular dominance and myopic anisometropia in Chinese myopic subjects. This relevance would facilitate to identify the ocular dominance in bilateral cataract patients. Design: Retrospectively case study. Participants: 1503 Chinese myopic subjects, mean age 27 years, who were candidates for corneal myopic refractive surgery were reviewed between 20...

PURPOSE To comparatively investigate the clinical outcomes, vector parameters, and corneal aberrations of small incision lenticule extraction (SMILE) with a triple centration technique and corneal wavefront-guided transepithelial photorefractive keratectomy (PRK) for the correction of high astigmatism. METHODS This retrospective, comparative case series study included 89 eyes (89 patients) th...

Interest in peripheral refractive errors has increased as it was hypothesized that peripheral hypermetropia might provide a stimulus for axial elongation (Smith et al., 2005), this study was to determine relative peripheral refractive errors (RPRE) of the eyes of a group of Chinese children and adults. Central and peripheral (20 degrees , 30 degrees , 40 degrees at nasal, temporal, superior and...

Morning glory syndrome is a congenital anomaly of the posterior pole which is characterised by an ectasia of the posterior pole of the fundus involving the optic disc. In addition there is a slightly protruding pigment ring in the peripapillary area, and nonbranching veins protrude in radial formation from the ectasia. Recognition of veins and arteries is always difficult. The peripheral retina...

purpose : to evaluate the outcome of iris-claw phakic intraocular lens (piol) implantation for high myopia in a subspecialty training setting methods : iris-claw phakic artisan (ophtec b.v., groningen , the netherlands) intraocular lens implanted patients were invited for an evaluation visit: 83 eyes had been operated on by a group of 10 cornea fellows under the supervision of nine anterior seg...