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प्रश्न
With reference to the functioning of the eye, answer the question that follow:
Name the cells of the retina and its respective pigments which get activated in the light.
उत्तर
In the light: Cells - cone cells, Pigment – iodopsin
संबंधित प्रश्न
Write the function of the following part of the human eye: ciliary muscles
Draw a neat and labelled diagram of the structure of the human eye.
The optical prescription for a pair of spectacles is :
Right eye : −3.50 D
Left eye : −4.00 D
Which lens has a greater focal length?
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 spectacle lenses will converge light rays or diverge light rays.
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.
When is a person said to have developed cataract in his eye? How is the vision of a person having cataract restored?
How much is our field of view:
with both eyes open?
State whether the following statement is true or false:
Rabbit has eyes which look sideways.
The animals of prey have:
(a) two eyes at the front
(b) two eyes at the back
(c) two eyes on the sides
(d) one eye at the front and one on the side
Name the following:
The photoreceptors found in the retina of the eye.
With reference to the functioning of the eye, answer the question that follow:
Name the two structure in the eye responsible for bringing about the change in the shape of the lens.
State the Function:
Choroid coat in the eye
A small hole of changing diameter at the centre of Iris is called _______.
Write the name.
The fleshy screen behind cornea.
A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his text book. Which of the following statements is correct?
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?
The thin, transparent extension of sclerotic layer found in front of the lens 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 |
Name the following:
Three layers of the eye ball.
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.
