Vision

Q.

Good vision depends upon adequate intake of carotene rich food. Which of the following statements are true regarding Vitamin A.

1. Vitamin A derivatives are formed from carotene.

2. Retinol is a derivative of Vitamin A.

3. Retinol is a light absorbing part of all the visual photopigments.

4. The photopigments are embedded in the membrane discs of the inner segments.

Q. Eyelids ar involuntary or voluntary muscles?

Q.

Which of the following parts of the eye are responsible for refraction and focusing?

1. Aqueous humour

2. Lens

3. All of these

4. Cornea

Q.

Daylight (photopic) vision and colour vision are functions of

1. Cones

2. Rods

3. Optic nerves

4. Both a and b

Q.

Which vitamin helps to keep our skin and eyes healthy?

1. Vitamin K
2. Vitamin E
3. Vitamin D
4. Vitamin A

Q.

Are eyes part of the nervous system?

Q.

What happens to the image distance in the eye when we increase the distance of an object from the eye?

Q.

Sometimes you remember a vivid picture of a dream you saw. What is the role of your eyes in this experience?

Q.

By closing the eyes and gently pressing them by your palms, you may see some specks of brilliant light. How do you get this sensation when there is no light entering your eyes?

Q.

How are electrical nerve impulses conveyed from the retina to the brain?

Q.

Which one from the scelertic layer and choroid layer forms the iris?

Q.

The process of focusing the eye to see the objects at different distances is termed as

1. Light adaptation

2. Dark adaptation

3. Stereoscopic vision

4. Accommodation

Q.

define stereoscopic vision

Q. Draw a neat and labelled diagram of the vertical section of the eye of man and explain its working.

Q.

Which part of the human body interprets the images formed on the retina?

1. Fovea

2. Brain

3. Optic chiasma

4. Retina

Q.

Give the biological term for the structure that carries visual stimuli from retina to the brain.

Q. What is the nature of image formed on the retina of human eye of an object?

1. Virtual and erect
2. Virtual and inverted
3. Real and erect
4. Real and inverted

Q.

In every human eye, there is a spot known as the "blind spot" where:

1. Both rods and cones are present

2. Only rods are present

3. Only cones are present

4. Both rods and cones are absent

Q.

Which part of the human body interprets the images formed on the retina?

1. Optic chiasma

2. Brain

3. Retina

4. Fovea

Q.

When you enter a dark room from bright lighted room you are blinded momentarily.Comment.

Q.

"Have you seen hats making people invisible" change into passive voice

Q. What is senescence? Is aging another word used for it?

Q. Name the cell which has the least power of regeneration...
can cone cells of eye be an Answer??

Q.

Choose between the two options to answer the question specified in the brackets for the following.

Sclerotic layer or choroid layer (Which one forms the iris?)

Q.

What happens when you walk from a sunlit compound into a dark place?

1. Regeneration of rhodopsin in the rods

2. Bleaching of rhodopsin in the rods

3. Bleaching of iodopsin in rods

4. Regeneration of iodopsin in rods

Q. Differentiate between.
Blind spot and fovea centralis

Q. Bipolar neurons occur in

1. Brain and spinal cord
2. Skeletal muscles
3. Vertebrate embryos
4. Retina of eye

Q. We feel blinded for a short while entering a dark room when coming from bright light.

Q.

Explain briefly on entering a poorly lit room, one feels blinded for a short while

Q.

Write short notes on

Eye care