Diseases of Eye

Q.

What is hypermetropia? Which lens can be used to correct hypermetropia?

Q.

Which among the following is a function of the vitreous humour?

1. Moistens the lens

2. Refracts light

3. Maintains the shape of the eyeball

4. Protects the retina

Q.

What is glaucoma?

Q.

Define Glaucoma.

Q.

Which of the following are false regarding night blindness?

1. Deficiency of rhodopsin in rod cells

2. Production of more retinal

3. Resynthesis of rhodopsin gets blocked

4. Ultimately leads to blindness

Q.

The deficiency of vitamin A causes a reduction in the production of photopsin in the rod cells.

1. True

2. False

3. Accommodation

4. Short-sightedness

Q.

If the reabsorption of aqueous humour does not occur, it causes a defect known as _________.

1. cataract

2. night blindness

3. colour blindness

4. glaucoma

Q.

What are the signs of being colour blind?

Q.

Which of the following eye defect is due to the non-formation of the pigment rhodopsin?

1. Astigmatism

2. Night blindness

3. Colour blindness

4. Presbyopia

Q.

Which of the following is a symptom of cataract?

1. Inability to distinguish between certain colours such as red and green.

2. The lens turns opaque and vision is reduced.

3. The lens break causing complete blindness.

4. Eye balls begin to bulge out.

Q. Match the following.

1. Glaucoma
2. Conjuctivitis
3. Cataract

Q. Match the disorders of the eye with the type of lens used for their correction.

1. Cylindrical lens
2. Concave lens
3. Convex lens

Q.

Choose the odd one out: haemophilia, night blindness, colour blindness, albinism.

Q. a) What is myopia and how can it be corrected?
b) Where is the pituitary gland located?
c) Which hormone is secreted by the delta cells of the Islets of Langerhans? [5 MARKS]

Q.

The deficiency of Vitamin A leads to deficiency of _________.

1. photopsin

2. rhodopsin

3. lysozyme

4. iodopsin

Q.

In the chemistry of vision in mammals, the photosensitive substance is called _____.

1. Retinol

2. Sclerotin

3. Rhodopsin

4. Melanin

Q.

People with __________ cannot see objects clearly under dim light conditions.

1. Colour blindness

2. Xerophthalmia

3. Glaucoma

4. Night blindness