PURPOSE To describe the distribution, and demographic and socioeconomic correlates of refractive error and related ocular biometry in an older British population. METHODS Refractive error was measured using an auto-refractor without cycloplegia. Pseudophakic individuals and those who had undergone refractive surgery were excluded from analysis. Axial length and anterior chamber depth were mea...

Purpose: To invcsligatc the polcnlial bcnclit of a lnrgcr ablation zone lix myopic PRK Methods: We reviewed the charts ,of patients who were included in the prospective evaluation of the Summi: Technologies lasers (Waltham, MA) with a minimum of 6 months follow up. 30 eyes treated with the Omnimed excimer laser (ablation zone 6 mm) were compared to 30 matched eyes treated with the Excimed model...

PURPOSE To assess possible refractive changes according to age and strabismus in a statistically significant cohort. METHODS A population-based sample of 12,534 subjects 0.5 to 20 years old, examined between 2004 and 2006, was tested. Each subject received a complete orthoptic examination, including spherocylindrical streak retinoscopy in cycloplegia. Patients were divided into those with ort...

PURPOSE The chicken, Gallus gallus domesticus, is used as an animal model to study the development of refractive error. Although vision is important in determining the eye's refractive state, relatively little is known about the retinal image quality of the chicken eye. An objective double-pass technique was used to measure the optical quality of the eyes of White Leghorn chickens. METHODS Me...

PURPOSE We assessed the prevalence and predictors of inaccurate refractive error among rural refractionists in western China. METHODS A subset of primary school children with visual acuity (VA) ≤6/12 in ≥1 eye, undergoing subjective refinement by local refractionists after cycloplegic autorefraction in an ongoing population-based study, received repeat refraction by university optometrists fo...

PURPOSE To determine the difference between cycloplegic and non-cycloplegic refractive error and its associated factors in Chinese children and adolescents with a high prevalence of myopia. METHODS A school-based study including 1565 students aged 6 to 21 years was conducted in 2013 in Ejina, Inner Mongolia, China. Comprehensive eye examinations were performed. Pre-and postcycloplegic refract...

Head and eye movements, together with ocular accommodation enable us to explore our visual environment. The stability of this environment is maintained during saccadic and vergence eye movements due to reduced contrast sensitivity to low spatial frequency information. Our recent work has revealed a new type of selective reduction of contrast sensitivity to high spatial frequency patterns during...

Purpose To confirm its dose-dependent effect on form deprivation myopia and evaluate the effect of MT3 at different tissue concentrations on changes in mRNA and protein expression for TGF-β2 and HAS2. Methods MT3 was intravitreally injected into deprived eyes at two-day intervals. Refraction was measured by streak retinoscopy after cycloplegia. The axial dimensions were measured by A-scan ult...

Purpose: To invcsligatc the polcnlial bcnclit of a lnrgcr ablation zone lix myopic PRK Methods: We reviewed the charts ,of patients who were included in the prospective evaluation of the Summi: Technologies lasers (Waltham, MA) with a minimum of 6 months follow up. 30 eyes treated with the Omnimed excimer laser (ablation zone 6 mm) were compared to 30 matched eyes treated with the Excimed model...

Purpose: To invcsligatc the polcnlial bcnclit of a lnrgcr ablation zone lix myopic PRK Methods: We reviewed the charts ,of patients who were included in the prospective evaluation of the Summi: Technologies lasers (Waltham, MA) with a minimum of 6 months follow up. 30 eyes treated with the Omnimed excimer laser (ablation zone 6 mm) were compared to 30 matched eyes treated with the Excimed model...