Q21. In the eye colour vision is effected by the presence of: (a)Choroid coat (b)Sclerotic coat (c) Rods (d) Cones
It is a thin, highly vascular (i.e. it contains blood vessels) membrane that is dark brown in colour and contains a pigment that absorbs excess light and so prevents blurred vision (due to too much light on the retina). The choroid is loosely attached to the inner surface of the sclera by the lamina fusa.
