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. This causes light rays to focus in front of the retina, _____ ______ _____ ______ __________ ___.
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