Refractive Errors of the Human Eye

Eye Development and Refractive Errors

School eye health – going beyond refractive errors

Health, including visual health, is inextricably linked to school achievement, quality of life, and economic productivity.1 Introducing health education in schools is essential as knowledge and good habits acquired at an early age are likely to persist. Globally, 19 million children are living with vision impairment2 and approximately 12 million children have a signifi cant, uncorrected refract...

Laser eye surgery for refractive errors.

Several laser and non-laser refractive surgical procedures have been used to modify the shape of the cornea and correct myopia, hyperopia, astigmatism, and presbyopia. Introduction of the excimer laser to reshape the cornea has resulted in remarkable developments in the correction of these refractive errors. Combined with other advanced ophthalmological instruments, laser refractive eye surgery...

Prevalence of Refractive Errors; the Yazd Eye Study

PURPOSE To determine the prevalence of refractive errors in Yazd, central Iran. METHODS This population-based study was performed in 2010-2011 and targeted adults aged 40 to 80 years. Multi-stage random cluster sampling was applied to select samples from urban and rural residents of Yazd. Manifest refraction, visual acuity measurement, retinoscopy and funduscopy were performed for all subject...

Analysis of Refractive errors in the human eye using Shack Hartmann Aberrometry

The refractive errors of normal, healthy eyes were measured using an indigenously developed Shack Hartmann aberrometer. Measurement was made in both right and left eyes after dilation for a 6mm pupil size. Power vector method was used to represent the sphero cylindrical errors. Analysis was done for astigmatism with the rule, oblique astigmatism and defocus between the right and left eyes of th...