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प्रश्न
A small hole of changing diameter at the centre of Iris is called _______.
पर्याय
optic nerves
cornea
optic disc
pupil
उत्तर
A small hole of changing diameter at the centre of Iris is called pupil.
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संबंधित प्रश्न
Write the function of the following part of the human eye: ciliary muscles
How does the eye regulate the amount of light that falls on the retina?
Draw a neat and labelled diagram of the structure of the human eye.
A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads :
Left eye : +2.50 D
Right eye : +2.00 D
State whether these lenses are thicker in the middle or at the edges.
Where is the image formed in a human eye?
What job does the pupil of the eye do?
What changes the shape of lens in the eye?
What is the:
near point of a normal human eye?
There are two types of light-sensitive cells in the human eye:
Where are they found?
How does the convex eye-lens differ from the ordinary convex lens made of glass?
Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliary muscles, eye-lens, retina, optic nerve and blind spot.
How much is our field of view:
with both eyes open?
Name two animals having eyes:
one the sides of the head.
Name the following:
The part of the eye responsible for its shape.
Define the following:
Yellow spot
Define the following:
Power of accommodation
Give the main function of the following:
Fovea centralis
Choose the correct answer.
In the chemistry of vision, the photosensitive substance is _________________
Choose the correct answer.
Which one is the photoreceptor _____________
Choose the correct answer.
Colour is detected by ____________
What is a stereoscopic vision?
Differentiate between:
Vitreous humour and Aqueous humour.
Differentiate between:
Retina and Choroid.
Name the following:
The region in the eye where the rods and cones are located.
What is the nature of the image that forms on the retina?
Give Technical Term:
The adjustment of the eye in order to obtain a clear vision of objects at different distances
State the Function:
Vitreous humour
Choose the Odd One Out:
Choose the Odd One Out:
For the normal human eye, the near point is at ___________ cm.
Complete the paragraph by choosing the right options given below.
(minimum, near point, 25 cm, farthest, farthest distance, far point)
The _______ distance of an object from a normal eye, at which it is clearly visible without stress on the eye, is called the minimum distance of distinct vision. The position of the object at this distance is called the _______ of the eye, for a normal human eye, the near point is at _______. The _______ distance of an object from a human eye, at which it is clearly visible without stress on the eye is called _______ of distinct vision. The position of the object at this distance is called the _______ of the eye.
The black opening between the aqueous humour and the lens is called ____________.
A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power
In the figure of the human eye, the cornea is represented by the letter
With neat, labeled diagram describe the structure of retina of eye.
Name the following:
Kind of retinal cells sensitive to dim light.
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 |
With reference to human eye answer the question that follow:
Name the part of the eye associated with the regulation of the shape of lens.
