![]() ![]() Please contact the rights holder of this image for permission requests. A clear, watery fluid Circulates in the front part of the eye, maintaining a constant pressure inside the eye. Any use of this image is subject to prevailing copyright laws. White part of the eye Is made of tough tissue Protects the inner workings of the eye and gives the eye its shape. The top panel shows outside of the eye including the eyelid, pupil, sclera, and iris the bottom panel shows inside of the eye including the cornea, lens, ciliary body, retina, choroid, optic nerve, and vitreous humor.Īnatomy of the eye, showing the outside and inside of the eye including the eyelid, pupil, sclera, iris, cornea, lens, ciliary body, retina, choroid, vitreous humor, and optic nerve.Ĭolor, Medical Illustration (JPEG format) The lens is the structure that changes shape to focus light on the retina. ![]() It occurs normally in dim illumination, or may be produced by certain drugs (mydriatics) or result from blunt trauma.Eye anatomy two-panel drawing shows the outside and inside of the eye. To understand how the eye sees, it helps to know the eye structures and functions: Cornea: Light enters through the cornea, the transparent outer covering of the eye. Animation: Structure and Function of the Eye. A dilated pupil is an enlarged pupil, resulting from contraction of the dilator muscle or relaxation of the iris sphincter. The iris constricts with bright illumination, with certain drugs, and can be a consequence of ocular inflammation. A constricted pupil occurs when the pupil size is reduced to constriction of the iris or relaxation of the iris dilator muscle. The pupil needs to be round in order to constrict. It is a variable-sized black circular opening in the center of the iris that regulates the amount of light that enters the eye. Accommodation, the mechanism by which an human eye increases refractive power, is produced by change in. ![]() ![]() The iris controls light constantly, adapts to lighting changes, and is responsible for near point reading (to see close, pupils must constrict) The human eye is a dynamic, complex optical system. The color of the iris affects how much light gets in. It keeps our eyes moist and clear and provides lubrication by secreting mucus and tears. Conjunctiva: It lines the sclera and is made up of stratified squamous epithelium. The iris is the pigmented tissue lying behind the cornea that gives color to the eye and controls the amount of light entering the eye by varying the size of the papillary opening. It is made up of dense connective tissue and protects the inner parts. ![]()
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