AIM To report the prevalence, risk factors and associated population attributable risk percentage (PAR) for refractive errors in the South Indian adult population. METHODS A population-based cross-sectional epidemiologic study was conducted in the Indian state of Andhra Pradesh. A multistage cluster, systematic, stratified random sampling method was used to obtain participants (n = 10293) for...

In this study, the wave-front aberrations of medium and high myopia with different CCT after SMILE were studied by finite element method. Then, various trend clinical significance was obtained. When same, diopters different. increased, variations However, regardless degree myopia, defocus primary spherical aberration most obvious. The larger CCT, smaller absolute values aberration.

High myopia often appears as a familial disease. It is usually defined as a refraction error equal to or below −6 diopters (D) in each eye. Highly myopic patients represent 27-33% of the myopic population. The prevalence of the disease in the general population varies according to the country, from 2.1% in the USA, to 3.2% in France, and up to 9.6% in Spain. High myopia is also termed “patholog...

OBJECTIVE To assess the relationship of near, midworking distance, and outdoor activities with prevalence of myopia in school-aged children. DESIGN Cross-sectional study of 2 age samples from 51 Sydney schools, selected using a random cluster design. PARTICIPANTS One thousand seven hundred sixty-five 6-year-olds (year 1) and 2367 12-year-olds (year 7) participated in the Sydney Myopia Study...

High myopia often appears as a familial disease. It is usually defined as a refraction error equal to or below −6 diopters (D) in each eye. Highly myopic patients represent 27-33% of the myopic population. The prevalence of the disease in the general population varies according to the country, from 2.1% in the USA, to 3.2% in France, and up to 9.6% in Spain. High myopia is also termed “patholog...

Myopia is the most common human eye disorder. With its increasing prevalence and earlier age-of-onset in recent birth cohorts, myopia now affects almost 33% of adults in the United States, and epidemic proportions of 85% to 90% adults in Asian cities. Unlike children in Western populations, where the prevalence of myopia is very low (less than 5%), Asian children have prevalences as high as 29%...

Pathological myopia is a major cause of irreversible vision loss and is the fourth to ninth most frequent cause of blindness in the world. Choroidal neovascularization (CNV) secondary to pathological myopia is the leading cause of vision impairment in patients younger than 50 years. New scientific contributions have been made to the understanding of high myopia and associated CNV. New treatment...

This systematic review was to compare the clinical outcomes between laser-assisted subepithelial keratectomy (LASEK) and laser in situ keratomileusis (LASIK) for myopia. Primary parameters included mean manifest refraction spherical equivalent (MRSE), MRSE within ±0.50 diopters, uncorrected visual acuity (UCVA) ≥20/20, and loss of ≥1 line of best-corrected visual acuity (BCVA). Secondary parame...

photorefractive keratectomy (prk) is a safe and effective surgical keratorefractive technique which is done with the application of mitomycin-c (mmc) in cases of high myopia to prevent the formation of corneal haze this study was conducted to evaluate 3-year visual acuity and quality outcomes of prk-mmc in high myopia. this before-after study was conducted on 20 individuals (40 eyes) with myopi...

PURPOSE Our study provides epidemiologic data on the prevalence of refractive errors in all age group ≥5 years in Korea. METHODS In 2008 to 2012, a total of 33,355 participants aged ≥5 years underwent ophthalmologic examinations. Using the right eye, myopia was defined as a spherical equivalent (SE) less than -0.5 or -1.0 diopters (D) in subjects aged 19 years and older or as an SE less than ...