PURPOSE To determine the prevalence of refractive errors in the public and private school system in the city of Natal, Northeastern Brazil. METHODS Refractometry was performed on both eyes of 1,024 randomly selected students, enrolled in the 2001 school year and the data were evaluated by the SPSS Data Editor 10.0. Ametropia was divided into: 1- from 0.1 to 0.99 diopter (D); 2- 1.0 to 2.99 D;...

We report a second clinico-pathologic report of recurrent keratoconus in a 43-year-old white female with bilateral penetrating keratoplasties for keratoconus. She was found to have a recurrence of this condition in the right eye as manifested by increasing myopic oblique astigmatism, subepithelial and anterior stromal scarring and corneal thinning, 22 years following the initial grafting proced...

PURPOSE To investigate mean ocular refraction (MOR) and astigmatism, over the human age range and compare severity of refractive error to earlier studies from clinical populations having large age ranges. METHODS For this descriptive study patient age, refractive error and history of surgery affecting refraction were abstracted from the Waterloo Eye Study database (WatES). Average MOR, standa...

The aim of this study was to calculate the level of improvement of visual acuity comparing the best corrected visual acuity (VA) achieved with spectacles with the best corrected VA achieved with rigid gas permeable (RGP) contact lenses in patients with high, simple or compound corneal astigmatism (myopic, hypermetropic and mixed). The investigation of patients included auto-kerato-refractometry...

PURPOSE The natural lens may provide some compensatory optical effect in the periphery. When it is substituted by an IOL during cataract surgery, the quality of the peripheral optics will be modified. We compared the peripheral image quality in the eyes of patients with one eye implanted with a monofocal IOL and the fellow eye still with the natural precataract lens. METHODS We used a scannin...

PURPOSE To compare the anterior chamber depth (ACD), keratometry (K) and astigmatism measurements taken by IOLMaster and Pentacam HR in normal and high myopic (HM) eyes. DESIGN A prospective observational case series. METHODS Sixty-six normal eyes and 59 HM eyes underwent ACD, keratometry and astigmatism measurements with both devices. Axial length (AL) was measured on IOLMaster. The interd...

Introduction and purpose. Early use of contact correction for congenital myopia astigmatism in children adolescents contributes to their social rehabilitation. The with lenses provides sustainability absence periods blurred retinal images, which are experienced the glasses. purpose study was determine, through long-term follow-up, extent lens improves uncorrected maximally corrected visual acui...

OBJECTIVE To examine aggregation of refraction, myopia, hyperopia, and astigmatism, as well as the 5-year change in each of these measures, among adult family members. DESIGN Geographically defined, population-based cohort study in Beaver Dam, Wis. Participants were all 43 to 84 years of age in 1988. Family relationships among participants of the study were identified through interviews. The ...