![]() ![]() This cookie is set by GDPR Cookie Consent plugin. These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. ![]() The optic nerve carries electrical impulses from the macula and retina to the processing center of the brain where they are interpreted into clear, colorful sight. The macula is sometimes referred to as “the bull’s eye center of the retina.” Optic NerveĬable-like structure composed of thousands of nerve fibers that connect the macula and retina with the brain. It is one hundred times more sensitive to detail than the peripheral retina. The macula is responsible for the sharp, straight-ahead vision that is used for seeing fine detail, reading, driving, and recognizing faces. MaculaĪn area of the eye near the center of the retina where visual perception is most acute. The retina receives light and sends electrical impulses to the brain that result in sight. The light sensitive retina consists of four major layers: the outer neural layer, containing nerve cells and blood vessels the photoreceptor layer, a single layer that contains the light sensing rods and cones the retinal pigment epithelium (RPE) and the choroid, consisting of connective tissue and capillaries. It is composed of millions of visual cells and it is connected by the optic nerve to the brain. RetinaĪ thin multi-layered membrane which lines the inside back two-thirds of the eye. It focuses light rays entering through the pupil in order to form an image on the retina. LensĪ transparent biconvex structure located behind the iris. Its color varies from pale blue to dark brown. The pigmented (colored) membrane of the eye, the iris is located between the cornea and the lens. The size of the pupil changes automatically to control the amount of light entering the eye. The round black hole in the center of the iris. The cornea is an important part of the focusing system of the eye. ![]() It is a thick, nearly circular structure covering the lens. The optic nerve then transmits these signals to the visual cortex – the part of the brain that controls our sense of sight.The transparent “front window” of the eye. The retina acts like an electronic image sensor of a digital camera, converting optical images into electrical signals. Light focused by the cornea and crystalline lens (and limited by the iris and pupil) then reaches the retina – the light-sensitive inner lining of the back of the eye. Process called accommodation, this lens automatically helps the eye focus on near and approaching objects, like an autofocus camera lens. The eye’s crystalline lens is located directly behind the pupil and further focuses light rays. The iris (colored part) of the eye functions like the diaphragm of a camera, controlling the amount of light reaching the retina by automatically adjusting the size of the pupil (aperture). Light is focused primarily by the cornea – the clear front surface of the eye, which acts like a camera lens. ![]() In a number of ways, the human eye works much like a digital camera: Read on for a basic description and explanation of the structure (anatomy) of your eyes and how they work (function) to help you see clearly and interact with your world. How vision works or the ins and outs of eye health. When surveyed about the five senses - sight, hearing, taste, smell and touch - people consistently report that their eyesight is the mode of perception they value (and fear losing) most.ĭespite this, many people don’t have a good understanding of the anatomy of the eye, ![]()
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