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प्रश्न
Draw a diagram of the human eye as seen in a vertical section and label the parts which suit the following descriptions relating to the:
(i) photosensitive layer of the eye.
(ii) structure which is responsible for holding the eye lens in its position.
(iii) structure which maintains the shape of the eyeball and the area of no vision.
(iv) anterior chamber seen in front of the eye lens.
(v) outermost transparent layer seen in front of the eyeball.
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संबंधित प्रश्न
With the help of ciliary muscles the human eye can change its curvature and thus alter the focal length of its lens. State the changes that occur in the curvature and focal length of the eye lens while viewing (a) a distance object, (b) nearby objects.
Name the part of the eye:
which controls the amount of light entering the eye.
Name the part of the retina which is insensitive to light.
What is the:
far point of a normal human eye?
Fill in the following blank with suitable word:
The part of eye which alters the size of the pupil is............
What shape are your eye-lenses:
when you look at a distant tree?
Which parts of the eye cause rays of light to converge on the retina?
State the main functions of the following:
Coronary Artery
Define the following:
Blind spot
The diagram alongside represents a certain defect of vision of the human eye.
(i) Name the defect.
(ii) Describe briefly the condition in the eye responsible for the defect.
(iii) Redraw the figure by adding a suitable lens correcting the defect. Label the parts through which light-rays pass.
(iv) What special advantage do human beings derive in having both eyes facing forward?
Choose the correct answer.
In the chemistry of vision, the photosensitive substance is _________________
Choose the correct answer.
Aperture controlling passage to light into the eye is ___________
Differentiate between:
Vitreous humour and Aqueous humour.
State the Function:
Ear drum
Write the function of the human eye and label parts of the figure given below.
______ is the structural and functional unit of living organisms.
Explain the role of the part of human eye responsible for power of accommodation of human eye.
Write in proper sequence the names of all the parts of the human eye through which the light rays coming from an object pass before they form an image on the retina.
Match the terms in column I with those in column II and write down the matching pairs.
| Column I | Column II | ||
| (i) | Conjunctiva | (a) | Viral infection |
| (ii) | Cornea | (b) | Ciliary body |
| (iii) | Choroid | (c) | Spiral-shaped |
| (iv) | Cochlea | (d) | Transparent epithelium |
| (v) | Conjunctivitis | (e) | Suspensory ligament |
| (f) | Contains melanin | ||
| (g) | Transparent but appears black |
Name the following:
Two pigments of the sensory cells.
