Our eye is just like a traditional camera that directs light into a film. Besides other parts main two part of our eye are lens and retina. When light,reflected from an object, passes through lens, bends to (converge) a specific spot on the retina and makes an inverted picture of that object. The sensation then carries to brain by optic nerve and we see that specific object.
When light can't refracted correctly or cornea is not in perfect shape so they don’t form a perfect image results to blurry or indistinct or distorted picture. That's why we are now start suffering from vision problem and start thinking for LASIK.
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