Myopia
Myopia, also known as nearsightedness, is a common refractive error where close objects appear clear, but distant objects look blurry.
What happens in Myopia:
- Light entering the eye focuses in front of the retina, instead of directly on it.
- This is usually because the eyeball is too long or the cornea is too curved.
Causes of Myopia:
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Genetics:
- Runs in families; if one or both parents are myopic, the risk increases.
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Environmental factors:
- Prolonged near work: Reading, studying, or using screens for long periods, especially at a young age.
- Lack of outdoor time: Studies show children who spend more time outdoors have a lower risk of developing myopia.
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Eye growth problems:
- During childhood and adolescence, the eye may grow too long, leading to myopia.
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Other contributing factors:
- Poor lighting while reading or working
- Incorrect posture
- Uncorrected minor refractive errors in early stages
Correction:
- Concave lenses (minus-powered glasses or contact lenses)
- Laser surgery (e.g., LASIK) for adults
- Orthokeratology (Ortho-K): Special night lenses to reshape the cornea temporarily
- Myopia control: Special lenses or drops (like atropine) in children to slow its progression
Let me know if you want a visual or diagram of how myopia works!
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