![]() It also helps the eye focus by directing light into the eye. The cornea, like the lashes, eyelids, and tear fluid, protects the eye from injury and foreign objects, such as dust. This chamber is a fluid-filled area between the cornea and iris. The cornea is a clear, dome-like layer that covers the pupil, iris, and anterior chamber. As it contracts or relaxes, it changes the shape of the lens. ![]() This is a muscular ring attached to the lens. With age, the lens becomes stiffer and less flexible, making focusing more difficult. The lens can change shape, helping the eye focus light accurately onto the retina. In this way, it is similar to the aperture on a camera.Īfter it travels through the pupil, light reaches the lens. It has muscles that control the size of the pupil and the amount of light that reaches the retina. This allows the eye to take in as much light as possible. In bright light, the pupil constricts to protect the sensitive retina from damage. The pupil expands and shrinks in response to light. This is the dark spot in the center of the colored part of the eye. If tissues are the wrong shape, misaligned, or damaged, vision can be blurry. Refracting tissues focus incoming light onto light-sensitive tissues to give a clear, sharp image. There are three main types of tissue in the eye:īelow, we look at each of these types. Muscles connected to the eyeball allow the eye to move according to the direction of the person’s gaze. ![]() The rest is inside the eye socket, or orbit. The only part of the eye that people can see is the front. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |