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प्रश्न
State the Function:
Choroid coat in the eye
उत्तर
Choroid layer with many capillaries forms the nutritive layer of the eye. The extended choroid layer forms the pigmented muscular curtain called the iris. The aperture in the centre through which light enters the aperture is called the pupil.
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संबंधित प्रश्न
Define the term.
Power of accommodation of the 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.
What is the name of:
the curved, transparent front surface of the eye?
What changes the shape of lens in the eye?
What is the:
near point of a normal human eye?
What happens to the eye when you enter a darkened cinema hall from bright sunshine? Give reason for your answer.
The size of the pupil of the eye is adjusted by:
(a) cornea
(b) ciliary muscles
(c) optic nerve
(d) iris
fill in the following blank with suitable word:
A person is short-sighted if his eyeball is too............Spectacles with a .............lens are needed. A person is long-sighted if his eyeball is too............Spectacles with a ................lens are needed. These focus light rays exactly on to the..........
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during near vision?
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during distant vision?
Label the following diagram :
Choose the correct answer.
Rods are receptor of ______________
Name the following:
The most sensitive region of the retina.
Give Technical Term:
The adjustment of the eye in order to obtain a clear vision of objects at different distances
Complete the following sentence with appropriate Word
The photoreceptor cells of the retina sensitive to colour are:
Given below is a diagram depicting a defect of the human eye. Answer the questions that follow:
- Give the scientific term for the defect.
- Mention one possible reason for the defect.
- What type of lens can be used to correct the defect?
In human eye the part which allows light to enter into the eye is ______.
Match the following:
|
Column - I |
Column - II | ||
| 1 | Retina | a | Path way of light |
| 2 | Pupil | b |
far point comes closer |
| 3 | Ciliary muscles | c |
near point moves away |
| 4 | Myopia | d | Screen of the eye |
| 5 | Hypermetropia | e | Power of accommodation |
Match the following.
| Column - I | Column - II | ||
| 1 | Retina | a | Path way of light |
| 2 | Pupil | b | Far point comes closer |
| 3 | Ciliary muscles | c | near point moves away |
| 4 | Myopia | d | screen of the eye |
| 5 | Hypermetropia | e | Power of accomadation |
An aperture that controls the passage of light into the eye is ______.
