In hypermetropia,the image is formed

The vitreous chamber is perforated from front to behind by a narrow tube which is known as

Photosensitive compounds are formed of which substances?

Select the correct option based on the given sentences regarding the mechanism of vision:
$(I)$ Light rays in the visible wavelength are focused on the retina through the cornea and lens.
$(II)$ It generates impulses in rods and cones.
$(III)$ Photosensitive pigment is composed of an opsin (protein) and retinal (an aldehyde of vitamin $A$).
$(IV)$ Light induces the dissociation of retinal and opsin.
$(V)$ This process causes a change in membrane permeability,as a result,potential differences are generated in the photoreceptor cells.

The pupil is a part of the ........

The part of an eye which acts like a diaphragm of a photographic camera is