Briefly explain any three disorders of image formation. How are they corrected?

Three common disorders of image formation are myopia, hyperopia, and astigmatism. These conditions affect how light is focused on the retina, impacting vision clarity.

1. Myopia (Nearsightedness):  
   Myopia occurs when the eyeball is elongated or the cornea is excessively curved. ____ ______ ____ ______ _______ __________ _________ _____ ________.
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