Q1 of 102 Page 130

Name the following:

The eye defect caused due to shortening of the eyeball from front to back.

Hypermetropia


Explanation: The medical name for long-sight is hypermetropia, sometimes called hyperopia. These are also known as refractive errors. Long sight leads to problems with near vision. Long sight can be corrected by glasses or contact lenses, or sometimes 'cured' with laser eye surgery.


More from this chapter

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1

Name the following:

The nerves which transmit the impulse from ear to the brain.

 1

Name the following:

The photoreceptors found in the retina of the eye.

 2

Note the relationship between the first two words and suggest the suitable word/words for the fourth place.

(a) Cones: Iodopsin:: Rods: ………….


(b) Sound: Eardrum :: Dynamic balance : …………………..

 3

Which one or more of the expressions in column II are appropriate for the items listed in column I? Write the correct matching pairs







































Column I



Column II



(i) The blind spot



(a) Colour of the eye



(ii) The yellow spot



(b) Shape of the lens



(iii) Ciliary muscle



(c) Protective covering of the brain



(iv) Iris



(d) Basic unit of brain



(v) Meninges



(e) free of rod cells




(f) vitreous humour




(g) centre of the retina




(h) no sensory cells



Correct matching


(i) : ……………….. …………………


(ii) : ………………. ………………..


(iii) : ………………… ……………….


(iv) : ………………. …………………..


(v) : ………………….. ………………….