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प्रश्न
State the functions of the following:
Ciliary muscles
उत्तर
Adjust the curvature of the eye's lens to concentrate on objects at different distances.
संबंधित प्रश्न
Define the term.
Power of accommodation of the eye.
Write short notes on the following: Retina
Name the part of the eye:
which changes the focal length of eye-lens.
Name the part of the retina which is insensitive to light.
Where does the greatest degree of refraction of light occur in the eye?
What do the ciliary muscles do when you are focusing on a nearby object?
Fill in the following blank with suitable word:
To bring light from a distant object to a focus on the retina of the eye, the convex eye-lens needs to be made..........
If you walk from a dark room into sunlight and back again into dark room, how would your pupils alter in size? What makes this happen?
Suggest how your irises help to protect the retinas of your eyes from damage by bright light.
Answer the following question.
Trace the sequence of events Whichoccur when a bright light is focused on your eyes.
Differentiate between:
Yellow spot and Blind spot.
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?
Which of the following statements is correct regarding rods and cones in the human eye?
With reference to human eye, answer the following question.
What is aqueous humor?
State the functions of the following:
Iris
Name the following:
Kind of retinal cells sensitive to dim light.
Name the following:
The circular opening enclosed by iris.
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 |
Write the main functional activity of the following structure.
Choroid
Differentiate between members of the following pair with reference to what is asked in the bracket.
Aqueous humour and vitreous humour (location).
