Difference between revisions of Myopia
Jump to navigation
Jump to search
m
no edit summary
Viceroy Sam (talk | contribs) m (Sam.Watson moved page Myopia to Near-sightedness: Common term, see Google trends) |
mNo edit summary |
||
| (19 intermediate revisions by 8 users not shown) | |||
| Line 1: | Line 1: | ||
'''Myopia''', also known as '''near-sightedness''' or '''short-sightedness''', is a refractive state where distant objects at infinity focus in front of the [[retina]]. This generally causes distant objects to appear [[blur]]ry, while close objects appear clear with [[accommodation]]. This occurs because of a mismatch between the [[axial length]] and the focusing power of the visual system, causing the image of an object. Someone who has myopia is called a '''myope'''. | |||
==Low Myopia== | |||
Low Myopia is short-sightedness in the range of -3 dpt or below. Most people who develop Myopia throughout their lifetimes are prescribed with glasses in the Low Myopia range initially at around -1 dpt after experiencing [[Pseudomyopia]]. | Low Myopia is short-sightedness in the range of -3 dpt or below. Most people who develop Myopia throughout their lifetimes are prescribed with glasses in the Low Myopia range initially at around -1 dpt after experiencing [[Pseudomyopia]]. | ||
According to the WHO, threshold for Myopia has been defined at 0.5 D. | |||
The same basic principles for reversing [[Lens-induced myopia]] apply for all ranges of | ===Zero differentials=== | ||
The same basic principles for reversing [[Lens-induced myopia]] apply for all ranges of myopia, however below -2 to -1.5 dpt usually no glasses are needed for [[close-up]] work. This means that improvement might slow down because positive [[stimulus]] can only come from [[Distance Vision]], unless [[plus lenses]] are used. | |||
== | ===Very low myopia=== | ||
Instead of reducing from -1.5, -1.25, or -1 (based on personal preference), the current EM strategy is to alternate zero and normalized correction, which is a variation of [[zero diopter reset]]. | |||
==Moderate Myopia== | |||
Definitions vary, but -2 or -3 to -5 or -6 is considered moderate myopia. | |||
==High Myopia== | |||
Definitions vary, but more than -5 or -6 diopters is considered high myopia. This category has a higher risk of various eye diseases and should be particularly regular about getting exams from an [[optometrist]] or ophthalmologist. If your myopia is even worse, see the [[severe myopia]] page for guidance. | |||
Very few people have high myopia for genetic reasons. Most people who have high myopia had gradually-increasing [[lens-induced myopia]]. | |||
[[Category:Articles]] | [[Category:Articles]] | ||
[[Category:Eye conditions]] | [[Category:Eye conditions]] | ||