PURPOSE Test-retest variability (TRV) limits our ability to detect clinically significant changes in visual acuity (VA). We wanted to compare the effect of scoring and termination rules on TRV for logMAR charts, employing either conventional or pseudo high-pass (Vanishing Optotype) letters. METHODS VA measurements and TRV were compared in 50 uncorrected normal observers (17 male, mean age 42....

BACKGROUND Uncorrected Refractive errors are the most common cause of avoidable visual impairment in children worldwide. Importance of school screening of refractive errors are one of the most important initiatives outlined in WHO Vision 2020 targets for control of avoidable visual impairment in children. But the benefit depends on the compliance of the spectacle wear by children. PURPOSE To ...

purpose : to determine the relationship between refractive errors and ocular components values in carpet weavers methods : refractive errors and ocular components values were investigated on carpet weavers at mashhad city in iran . after selection of samples, the individuals who had ophthalmic and systemic disease effective on the refractive errors were excluded from the study. refractive error...

purpose: retinopathy of prematurity (rop) adversely affects normal ocular vascularization in premature infants. it can be mild with no visual consequences, or may become aggressive with new vessel formation and even progress to retinal detachment and blindness. modern treatment can prevent blindness due to neovascularization but uncorrected refractive errors may lead to amblyopia. methods: in t...

Purpose: To assess the visual and refractive outcomes after implantation of Toric Implantable Collamer Lens (T-ICL) in compound myopic astigmatism Methods: In this prospective study, 28 eyes with manifest refraction spherical equivalent (MRSE) errors of -10.94±4.09 diopter (D) and mean cylindrical errors of -3.47±1.39 D underwent T-ICL implantation. Six months after surgery, best corrected and ...

PURPOSE To evaluate the safety, efficacy, and contralateral eye comparison of topography-guided myopic LASIK with two different refraction treatment strategies. SETTING Private clinical ophthalmology practice. PATIENTS AND METHODS A total of 100 eyes (50 patients) in consecutive cases of myopic topography-guided LASIK procedures with the same refractive platform (FS200 femtosecond and EX500...

PURPOSE To assess the long-term outcomes of implanting intrastromal corneal ring segments (ICRS) in paracentral keratoconic eyes. METHODS 58 eyes with paracentral keratoconus with coincident refractive, keratometric, and comatic axes were evaluated. Uncorrected (UDVA) and corrected (CDVA) distance visual acuity and refractive errors were recorded before and at all follow-up visits. The postop...

OBJECTIVE To examine factors influencing adherence to spectacle wear and perceived value within a prospective 1-month trial of ready-made and custom spectacles in school-aged children with uncorrected refractive error in urban China. METHODS A total of 428 students aged 12 to 15 years with at least 1 diopter of uncorrected refractive error were given free spectacles and evaluated 1 month late...

PURPOSE To report the 9-12-month outcomes of a novel procedure for reduction of low myopia through epithelium-on photorefractive intrastromal cross-linking (PiXL) with customized control of topographic distribution of ultraviolet (UV)-fluence. METHOD Myopic patients with normal (non-ectatic) corneas underwent the PiXL procedure for reduction of low myopia. PiXL treatments were delivered throu...