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MyopiaAka: Nearsighted, Shortsighted
- See Also
- Refractive Error
- Epidemiology
- Most common Refractive Error
- Causes
- Autosomal dominant inheritance
- Mild Myopia (-0.5 to -2.0 D) by age 5 to 8 years
- Moderate Myopia (-2.0 to -5.0 D) by age 8-14
- Severe Myopia (<-6.0 D) by age 20 to 28 years
- Environmental Cause (Prolonged reading, close work)
- Mild Myopia (-0.5 to -2.0 D) by age 8-14 years
- Moderate Myopia (-2.0 to -5.0 D) by age 20-28
- Pathophysiology
- Light rays focus in front of Cornea
- Cornea too curved or lens too powerful for globe
- Distant objects not seen clearly
- Correction: Concave lenses (divergent, minus power)
- Degrees of Refractive Error
- Mild Myopia (>-1.5 Diopters)
- Moderate Myopia (-1.5 to -6.0 Diopters)
- High Myopia (<-6 Diopters)
- Severe Myopia (<-8 Diopters) associated conditions
- Glaucoma
- Retinal Detachment
- Macular Degeneration
- Management
- See Refractive Error
- References
- Fredrick (2002) BMJ 324:1195
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| Definition (MSH) | A refractive error in which rays of light entering the EYE parallel to the optic axis are brought to a focus in front of the RETINA when accommodation (ACCOMMODATION, OCULAR) is relaxed. This results from an overly curved CORNEA or from the eyeball being too long from front to back. It is also called nearsightedness. |
| Definition (CSP) | a refractive error in which rays of light entering the eye parallel to the optic axis are brought to a focus in front of the retina, as a result of the eyeball being too long from front to back; also called nearsightedness because the near point is less distant than it is in emmetropia with an equal amplitude of accommodation. |
| Concepts | Disease or Syndrome (T047)
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| ICD9 | 367.1 |
| English | Myopia, Myopias, Near sighted, near vision, Nearsightedness, Nearsightednesses, SHORT SIGHTEDNESS |
| Spanish | miopÃa, miopia, vista cercana |
| Credits | Derived from the NIH UMLS (Unified Medical Language System)
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