Q. No.From outside to inside, the correct sequence of cells in the inner layer of human retina will be:
1. Photoreceptor cells, Bipolar cells, Ganglion cells
2. Ganglion cells, Bipolar cells, Photoreceptor cells
3. Photoreceptor cells, Ganglion cells, Bipolar cells
4. Ganglion cells, Photoreceptor cells, Bipolar cells
In the human eye, there are three types of cones – red blue and green. When these cones are stimulated equally, a sensation for which of the following colors would be produced?
| 1. White | 2. Black |
| 3. Orange | 4. Yellow |
The space between the cornea and the lens in human eye is filled with:
| 1. Aqueous humor | 2. Vitreous humor |
| 3. Lymph | 4. Air |
When the ciliary muscles in the human eye contract:
1. the lens becomes more convex, generally improving the focus for closer objects
2. the lens becomes more convex, generally improving the focus for farther objects
3. the lens becomes more flat, generally improving the focus for closer objects
4. the lens becomes more flat, generally improving the focus for farther objects
The amount of light entering the human eye is regulated by:
| 1. Pupil | 2. Iris |
| 3. Cornea | 4. Ciliary body |
Identify the correct match:
|
1. |
Fovea centralis |
Point of highest visual acquity |
|
2. |
Optic disc |
Visual cortex in cerebrum |
|
3. |
Ciliary body |
Light and dark adaptation |
|
4. |
Macula lutea |
Lacks any rods and cones |
Photopigments in the human eye are composed of:
1. a lipid and an ester of vitamin A
2. a protein and an ester of vitamin A
3. a lipid and an aldehyde of vitamin A
4. a protein and an aldehyde of vitamin A
I: Choroid contains many blood vessels and looks bluish in colour.
II. It becomes thick in the anterior part to form the ciliary body.
III. The ciliary body itself continues forward to form the iris which is the visible cloured portion of the eye.
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| Statement I: | Photopic vision and colour vision is the function of rods in the human eye. |
| Statement II: | Scotopic [twilight] vision is the function of cones in the human eye. |
| 1. | Both Statement I and Statement II are correct |
| 2. | Both Statement I and Statement II are incorrect |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
| Statement I: | The point where the optic nerve leaves the human eyeball is called as the blind spot. |
| Statement II: | This area has only cones with highest visual acuity in human eye. |
| 1. | Both Statement I and Statement II are correct |
| 2. | Both Statement I and Statement II are incorrect |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
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