نتایج جستجو برای: residual refractive errors
تعداد نتایج: 245765 فیلتر نتایج به سال:
BACKGROUND Myopia is a very common condition and a significant public health problem in China. The objective of the study was to explore the genetic influence on myopia in Mainland China school-aged children in Beijing. METHODS In 2008, the data from 15,316 Chinese school students aged 6-18 years from 19 randomized schools in Beijing were analyzed to evaluate genetic influence on myopia in ch...
PURPOSE To examine the extent to which the two major determinants of refractive error, corneal curvature and axial length, are scaled relative to one another by shared genetic variants, along with their relationship to the genetic scaling of height. METHODS Corneal curvature, axial length, and height were measured in unrelated 14- to 17-year-old white European participants of the Avon Longitu...
Centre for Eye Research Australia, University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Australia Vision Cooperative Research Centre, Sydney, Australia The Fred Hollows Foundation New Zealand, Auckland, New Zealand The Fred Hollows Foundation, Sydney, Australia International Agency for Prevention of Blindness, Western Pacific Region, Melbourne, Australia International Counc...
Introduction: There is insufficient information about the correlation between hearing and visual impairments. Its importance arises when trainers should care about medical issues of their clients. Refractive errors of the eye are one of the main causes of visual loss in the society. The purpose of this study was to evaluate the relationship between refractive errors in the eye (by the type of r...
purpose : to determine the effect of carpet weaving on refractive errors methods : in this cross sectional study, carpet weavers and non-weavers in the normal population of mashhad were regarded as exposed and non-exposed groups, respectively. a carpet weaver was a person who wove carpets 7 hours a day for at least 2 years. the non-weavers group was selected from the population of mashhad throu...
Power-adjustable spectacle lenses, based on the Alvarez-Lohmann principle, can be used to provide affordable spectacles for subjective refractive errors measurement and its correction. A new mechanical frame has been designed to maximize the advantages of this technology. The design includes a mechanism to match the interpupillary distance with that of the optical centers of the lenses. The fra...
Pterygium is known to affect refractive astigmatism, which can have a significant impact on vision. This study was undertaken to evaluate the effect of pterygium excision on refractive astigmatism. Thirty-six eyes with primary pterygium with astigmatism of 2D or more were analysed before and after pterygium excision. Astigmatism increased with the increase in the grade of pterygium (P = 0.00000...
The purpose of this study was to investigate the relationship between heterophoria and refractive error. Thirty-six subjects (11 myopes, 25 emmetropes) participated in this study. Heterophoria was measured with the Free-Space Phoria Card at five different viewing distances (25cm, 33cm, 50cm, 100cm and 300cm). Regardless of the types of heterophoria, the amount of heterophoria reduced towards or...
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