Light travels through the eye by entering through the protective layer called the cornea (17). It then moves through the opening of the pupil which is surrounded by the iris (18), which is a muscle. It will then go through the transparent structure behind the pupil known as the (19) that changes shape to help focus images on the retina in a process known as (20) The retina contains the photoreceptors known as the (21) and (22). It is there that the actual process of transduction occurs when the photoreceptors excite the (23) cells which in turn send the message on to the (24) cells whose axons make up the optic nerve. The information will then travel to the (25), which is the sensory switchboard within the brain and end up in the (26) lobes where the information is processed specifically within the primary cortex (27).

The correct answer is - 17) Cornea  , 18) Iris  , 19) Lens, 20) Accommodation , 21) Rods, 22) Cones,  23) Bipolar, 24) Ganglion , 25) Optic Nerve, 26) Occipital, 27) Visual.

Explanation:

The protective layer called the cornea that allows light to enter travel through it to the eyes. Light moves through the pupil surrounded by the muscle called the iris and travels through the lens, a transparent structure that changes its shape on the basis of the intensity of light to help focus images on the retina during the accomadation process. Photoreceptors that are present in the retina are called cones and rods.

The process of transduction takes place when these photoreceptors excite bipolar cells to send signals or messages to the ganglion cells that have axons that make the optic nerves, the sensory switchboard within the brain, and get the messages sent by the photoreceptors. These optic nerves end in occipital lobes where all the signals and messages are processed specifically within the region called the primary visual cortex.