Class X

The coloured diaphragm between cornea and lens is known as __________.
  1. Iris
  2. cornea
  3. retina
  4. Blind Spot
A jelly fluid filling the space between lens and retina is called _________. It with stands atmospheric pressure and prevents eye ball from collapsing.
  1. vitreous humour
  2. Iris
  3. retina
  4. Blind Spot
Human is made up of ___________ jelly fluid material and it is a _________ __________ lens.
  1. crystalline, double, convex
  2. retina
  3. cornea
  4. Iris
In __________ distant objects are not clearly visible. It is corrected by using ________ lens.
  1. myopia, concave
  2. cornea
  3. retina
  4. Iris
________ occurs due to weakening of ciliary muscles in old age. It can be corrected by using __________ lenses.
  1. Iris
  2. retina
  3. cornea
  4. Presbyopia, bi-focal
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