The rods contain

(1) A purplish red protein called the rhodopsin or visual purple

(2) A yellow red pigment called leutopsin or visual yellow

(3) A brown yellow pigment called rhodopsin or visual brown

(4) Both A and B

(1) Is a derivative of vitamin A

(2) Has a derivative of vitamin A

(3) Has vitamin A

(4) Is vitamin A

(1) Red

(2) Green

(3) Blue

(4) Yellow

(1) When rodes are stimulated more than cones

(2) When cones are equally stimulated

(3) When rodes are equally stimulated

(4) When cones are stimulated more than rodes

(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

(1) Photoreceptor cells are not present in blind spot

(2) Retinal blood vessels enter at that point

(3) Optic nerves leave the eye at this point

(4) Is slightly below the posterior pole of the eyeball.

(1) At the posterior pole of the eyeball which is lateral to the blind spot

(2) At the anterior pole of the eyeball which is above to the blind spot

(3) At the anterior pole of the durbal which is lateral the blind spot

(4) At the posterior pole of the eyeball which is below the blind spot

(1) Yellow spot, dark spot

(2) Yellow spot, pit

(3) Pit, yellow spot

(4) Dark spot, pit

(1) Central pit of yellow spot

(2) Thinned out portion of the retina

(3) Only cones are densely packed here

(4) Visual acuity is least here

(1) Fovea

(2) Yellow spot

(3) Blind spot

(4) Retina