7. Name the eye defects caused due to each of the following: Cause Eye defect (a) Lens turns opaque (b) Uneven curvature of the cornea (c) Deficiency of vitamin A (d) Lens loses its flexibility (e) Eye ball lengthens from front to back (f) Lens becomes too flat
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CauseEye defect(a) Lens turns opaqueCataract(b) Uneven curvature of the corneaAstigmatism(c) Deficiency of vitamin ANight blindness(d) Lens loses its flexibilityPresbyopia(e) Eye ball lengthens from front to backMyopia(f) Lens becomes too flatHyperopia
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