OBJECTIVES Visual acuity is a common measurement in general practice, and the advent of new technology such as tablet computers offers a change in the way in which these tests are delivered. The aim of this study was to assess whether measurements of distance visual acuity using LogMAR letter charts displayed on an iPad tablet computer were in agreement with standard clinical tests of visual ac...

PURPOSE To determine if short term effects of intravitreal anti-vascular endothelial growth factor or steroid injection are correlated with fluid turbidity, as detected by spectral domain optical coherence tomography (SD-OCT) in diabetic macular edema (DME) patients. METHODS A total of 583 medical records were reviewed and 104 cases were enrolled. Sixty eyes received a single intravitreal bev...

PURPOSE Our purpose was to evaluate the long-term visual outcomes after bilateral implantation of Crystalens(®) HD (Bausch and Lomb, Inc.) accommodative intraocular lenses. METHODS In this study, 25 patients (50 eyes) who underwent cataract surgery and bilateral Crystalens HD accommodative intraocular lens implantation were included. The Crystalens HD lens was implanted in the bag in both eye...

purpose: to determine the anatomical sites and causes of severe visual impairment (svi) and blindness in children attending a school for the blind in ahvaz. methods: in this case series study, all 51 students of the only school for the blind in ahvaz were examined by two ophthalmologists. blindness and svi were defined according to the world health organization (who) criteria as visual acuity l...

Purpose: Amblyopia is a developmental disorder of spatial vision for which there is no positive diagnostic test. The present study evaluates the recently developed “Pelli-Levi Dual Acuity Chart” as a positive diagnostic test for amblyopia (Pelli, Levi & Chung, 2004). This chart consists of letters, as usual, on one side and letters in noise on the other. This exploits the finding that, for lett...

INTRODUCTION The visual outcome of cataract surgery in patients with a previous history of KAMRA inlay implantation is an emerging issue for which limited research exists. The purpose of this study is to describe postoperative visual outcomes in this patient population. METHODS This is a case series with retrospective chart review. Seven patients underwent cataract surgery following KAMRA cor...

BACKGROUND Although intact vestibular function is indispensable to maintaining spatial orientation, no good screening tests of vestibular function are implemented in the aviation community. High frequency voluntary head rotation was selected as a vestibular stimulus to isolate the vestibulo-ocular reflex (VOR) from visual influence. METHOD A dynamic visual acuity test that incorporates volunt...

Method: Thirty-three clusters of 50 subjects ≥ 50 years old were randomly selected. Consenting subjects underwent enumeration to establish a demographic profile and thereafter a clinical examination. Visual acuity (VA) was measured with a Tumbling ‘E’ chart; participants having a VA < 6/18 were retested with a pinhole. If no improvement in VA occurred, subjects underwent clinical examination, i...

PURPOSE To assess the prevalence of presenting visual impairment and refractive errors on the isolated island of Ta'u, American Samoa. METHODS Presenting visual acuity and refractive errors of 124 adults over 40 years of age (55 male and 69 female) were measured using the Snellen chart and an autorefractometer. This sample represented over 50% of the island's eligible population. RESULTS In...