What are the parts of human eye and its function?
The cornea, a clear window at the front of the eye, covers the iris and the pupil. A clear lens, located behind the pupil, acts like a camera lens by focusing light onto the retina at the back of the eye. The retina is a light-sensitive inner lining at the back of the eye.
What is the anatomy of the human eye?
The eye is made up of three coats, which enclose the optically clear aqueous humour, lens, and vitreous body. The outermost coat consists of the cornea and the sclera; the middle coat contains the main blood supply to the eye and consists, from the back forward, of the choroid, the ciliary body, and the iris.
What is the eye function?
The eye is a sensory organ. It collects light from the visible world around us and converts it into nerve impulses. The optic nerve transmits these signals to the brain, which forms an image so thereby providing sight.
What is the pupil function?
The function of the pupil is clearly that of controlling the amount of light entering the eye, and hence the light reflex.
What is retina function?
The retina is a layer of photoreceptors cells and glial cells within the eye that captures incoming photons and transmits them along neuronal pathways as both electrical and chemical signals for the brain to perceive a visual picture.
What is the function of iris and retina?
2) The iris regulates the size of the pupil which controls how much light is allowed to enter the eye. 3) Behind the pupil is the lens that focuses light (or an image) onto the retina . 4) The retina contains many photoreceptor cells that convert light into electric signals.
What is the function of iris and pupil in human eye?
The iris allows more light into the eye (enlarging or dilating the pupil) when the environment is dark and allows less light into the eye (shrinking or constricting the pupil) when the environment is bright.