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:

  1. Genetics:

    • Runs in families; if one or both parents are myopic, the risk increases.
  2. 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.
  3. Eye growth problems:

    • During childhood and adolescence, the eye may grow too long, leading to myopia.
  4. 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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