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Defects of
Vision
Myopia (short-
sightedness) can
be corrected
using concave
lens
Hypermetropia
(long-sightedness)
can be corrected
using convex lens
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• Eyes of crab are small but it can
look all around with those eyes.
• The owl has a large cornea and a
large pupil to allow more light in
its eye. It’s retiŶa has ŵore rods
thaŶ cones. The day birds have
more cones and less rods.
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  • 8. Defects of Vision Myopia (short- sightedness) can be corrected using concave lens Hypermetropia (long-sightedness) can be corrected using convex lens
  • 10. • Eyes of crab are small but it can look all around with those eyes. • The owl has a large cornea and a large pupil to allow more light in its eye. It’s retiŶa has ŵore rods thaŶ cones. The day birds have more cones and less rods.