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प्रश्न
Select the odd one in the following series:
Retina, Sclera, Ciliary body, Nephron.
उत्तर
Nephron
APPEARS IN
संबंधित प्रश्न
Explain, why a normal eye is not able to see distinctly the objects placed closer than 25 cm, without putting any strain on the eye.
Explain why the image distance in the eye does not change when we change the distance of an object from the 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
Which lens bends the light rays more strongly?
Out of rods and cones m the retina of your eye:
which detect colour?
State whether the following statement is true or false:
The image formed on our retina is upside-down
Give the scientific names of the following parts of the eye:
a clear window at the front of the eye.
How much is our field of view:
with both eyes open?
In what two ways is the yellow spot different from the blind spot?
Sometimes you remember a vivid picture of a dream you saw. What is the role of your eyes in this experience?
We see advertisements for eye donation on television or in newspapers. Write the importance of such advertisements.
Name the following:
Short sightedness.
Name the following:
The pigmented circular area seen in the eye.
Name the following:
Fluid present in the posterior chamber of the eye.
Give Technical Term:
Name the part of the retina on which an object is focused for the clearest vision.
The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass.
Vision defect that increases distance between the lens of the eye and retina of the eye is termed as myopia.
Shylesh is a school-going kid studying standard VIII. He is crazy about playing video games on mobile phones. After a couple of months, his eyes turned red and he felt severe pain in his eyes. His science teacher enquired about this and advised his parents to take him to an eye doctor.
- How does excessive usage of mobile phone affect our eyes?
- What are the values shown by the teacher?
State the functions of the following:
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 |
