Advertisements
Advertisements
Question
When is a person said to have developed cataract in his eye? How is the vision of a person having cataract restored?
Solution
A person is said to have developed cataract when the eye lens becomes cloudy or opaque because of the formation of a membrane over the lens. This causes blurred vision and might eventually lead to complete loss of vision. Cataract is a medical condition that usually occurs in old age and cannot be corrected by any type of spectacle lenses. However, the vision of a person with cataract can be restored surgically by replacing the opaque lens in the eye with an artificial lens.
APPEARS IN
RELATED QUESTIONS
Which part brings the image into sharp focus on the retina? How does it do this?
The animal which does not have eyes that look sideways is:
(a) Horse
(b) Chicken
(c) Lion
(d) Fish
Choose the correct answer.
Colour is detected by ____________
What are the functions of tears?
Name the following:
The part of the eye responsible for change in the size of the pupil.
Name the following:
Fluid present in the posterior chamber of the eye.
Select the option with incorrect identification:
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 |
Where is the following located?
Yellow spot
With reference to human eye answer the question that follow:
Name the part of the eye associated with the regulation of the size of pupil.
