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प्रश्न
Name the following:
The photosensitive pigment present in the rods of the retina.
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उत्तर
Rhodopsin
संबंधित प्रश्न
Name the defect of vision in a person:
whose far point is less than infinity
Explain with the help of labelled ray diagram, the defect of vision called myopia and how it is corrected by a lens.
An eye has a near point distance of 0.75 m. What sort of lens in spectacles would be needed to reduce the near point distance to 0.25 m? Also calculate the power of lens required. Is this eye long-sighted or short-sighted?
State one role of ciliary muscles in the human eye.
State the main functions of the following:
Tears
Explain the Term: Astigmatism
What type of lens is used to correct Astigmatism?
Due to elongation of _______ and increase in curvature of the eye lens, a person cannot see distant objects clearly.
Observe the following diagram and answer questions following it:
- Identify the defect of vision shown.
- List its two causes.
- Name the type of lens used for the correction of this defect.
