From inside to outside the correct order of the following cells in the retina would be:
1. Ganglion cells - Photoreceptor cells - Bipolar cells
2. Ganglion cells - Bipolar cells - Photoreceptor cells
3. Bipolar cells - Photoreceptor cells - Ganglion cells
4. Photoreceptor cells - Ganglion cells - Bipolar cells
Good vision depends on adequate intake of carotene rich food.
Select the best option from the following statements.
I. Vitamin-A derivatives are formed from carotene.
II. The photopigments are embedded in the membrane discs of the inner segment.
III. Retinal is a derivative of vitamin-A.
IV. Retinal is a light absorbing part of all the visual photopigments.
(1) (I) and (II)
(2) (I), (III) and (IV)
(3) (I) and (III)
(4) (II), (III) and (IV)
Photosensitive compound in human eye is made up of
1. opsin and Retinal
2. opsin and Retinol
3. transducin and Retinene
4. guanosine and Retinol
Which of the following is wrong about eyes?
1. An adult human eye ball is nearly a spherical structure
2. Our paired eyes are located in sockets of the skull called orbits
3. The wall of the eye ball is composed of three layers
4. The external layer is composed of loose connective tissue and is called sclera
Cornea is
(1) Anterior portion of choroid
(2) Anterior portion of sclera
(3) Posterior portion of sclera
(4) Anterior portion of retina
Which of the following is not associated with Iris?
(1) Ciliary bodies form it
(2) Pigmented and transparent
(3) Visible colored part of the eye
(4) Present in anterior part of eye
Eye-Lens is not
(1) Transparent
(2) Crystalline
(3) Held in place by tendons attached to the ciliary body
(4) Both A and C
Pupil of human eye has not which of the following properties?
(1) In front of the lens
(2) The aperture surrounded by the Iris
(3) Diameter of the pupil is regulated by collagen fibres of Iris
(4) All of these
Which of the following is wrong with respect to Retina?
(1) Innermost layer of eye
(2) Three layers of neural cells
(3) Ganglion is outermost cell
(4) Rods and Cones are the photoreceptors over there
The point where optic nerve leave and the retinal blood vessels enter it is
(1) A point left to and slightly down the posterior pole of the eyeball
(2) A point medial to and slightly above the posterior pole of eye ball
(3) A point right to and slightly above the posterior pole of eyeball
(4) A point medial to and slightly down the posterior pole of the eyeball