International Journal of Healthcare Sciences ISSN 2348-5728 (Online) Vol. 8, Issue 2, pp: (37-51), Month: October 2020 - March 2021, Available at: www.researchpublish.com
ASTIGMATISM AMONG STUDENTS IN MEDICAL FACULTY OF UDAYANA UNIVERSITY SHARLEEANNA MECDONAH PROGRAM STUDI PENDIDIKAN DOKTER FAKULTAS KEDOKTERAN UNIVERSITAS UDAYANA, DENPASAR
Abstract: Astigmatism is frequently present during childbirth and may happen in blend with myopia or farsightedness. Astigmatism most of the time happens with other vision conditions like nearsightedness which is partial blindness (myopia) and hyperopia which is farsightedness. From the result of this study it can be concluded that the number of female and male who have astigmatism is almost similar. Study found that there are is no significant difference on gender when it comes to astigmatism. Most of the astigmatism students have some first degree relatives the diagnosis of astigmatism. Only a small percentage of students with astigmatism wear contact lenses. Most of the students with astigmatism spend more than 14 hours on phone, 7-14 hours on reading and less than 7 hours for watching TV. Keywords: Astigmatism, students, (myopia), watching TV.
I. INTRODUCTION 1.1 Background Astigmatism is a refractive error that happens when parallel rays of light entering the non accommoding eye are not centered around the retina. Astigmatism most of the time happens with other vision conditions like nearsightedness which is partial blindness (myopia) and hyperopia which is farsightedness. Together these vision conditions are alluded to as refractive mistakes since they influence how the eyes twist or "refract" light. The curvature of the cornea and focal point twists the light entering the eye keeping in mind the end goal to concentrate it absolutely on the retina at the back of the eye.1,2,3 In astigmatism, the surface of the cornea or lens has a somewhat different curvature. The surface of the cornea is shaped more like an egg rather than round like a ball, the vision can't concentrate light beams to a solitary point. Vision winds up noticeably out of center at any separation. Light beams refracted by this cornea are definitely not conveyed to a solitary point center, and retinal pictures from objects both far off and close are obscured and may show up widened or lengthened. This refractive blunder is called astigmatism. 2 What's more, the shape of the focal point inside the eye can change, bringing about an expansion or reduction in astigmatism. This change habitually happens in adulthood and can go before the improvement of cataract. Now and again astigmatism may create following eye damage or eye surgery.1,2 Add up to astigmatism can be partitioned into three which one of it is corneal or keratometric astigmatism in which the cornea turns out to be continuously thinner and cone shaped. 2,3 This outcomes in a lot of astigmatism, which causes poor vision that can't be plainly amended with eyeglasses. Individuals with keratoconus more often than not require contact focal points for clear vision and in the end may require a
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