![]() ![]() Ultimately, the lens loses its clarity and may turn yellow or become cloudy. This condition is known as presbyopia and can be remedied with reading glasses. As we get older, the flexibility of the lens decreases, and we become less able to change focus, particularly at near. The lens changes shape slightly so that we can change focus when viewing objects that are near or far. The lens focuses images of the outside world onto the retina. LensĪfter the iris, light next traverses the natural crystalline lens. It also contains the muscle that is responsible for focusing the natural crystalline lens. The ciliary body behind the iris is responsible for the production of aqueous fluid and maintaining eye pressure. It widens and narrows the pupil to enable more or less light to come into the eye. The iris is responsible for eye color and acts like the aperture of a camera. The iris is located inside the anterior chamber. Any trouble with the drainage or production of the aqueous can lead to high pressure within the eye and damage to the optic nerve, which is called glaucoma. This clear fluid is responsible for maintaining eye pressure. Located behind the cornea is the anterior chamber, which is filled with fluid called the aqueous. Inadequate tear production can cause dry eye. The tear film coats the cornea, the crystal clear window of the eye. When light enters the eye it initially encounters the tear film. The brain converts this electrical signal into an image. The optic nerve transmits that signal to the brain. The eye converts light into an electrical signal at the level of the retina. Just like a camera, the eye has many distinct parts that must function together as a whole to produce a clear image. The human eye, the organ of sight, is similar to a camera. K: Retina Converts light into electrical signals and sends them to the brain through the optic nerve.Vitreous Retina Macula Consultants of New York » Common Eye Conditions » Eye Anatomy.J: Pupil The pupil is the hole in the center of the iris that light passes through.The other two control your eyes when your head tilts. I: Orbital Muscles Six muscles are in charge of eye movement. ![]() H: Optic Nerve Connects your eye and brain with roughly 1.2 million nerve fibers.This ring of muscle fibers contracts and expands, to open and close your pupil, based on surrounding light. G: Iris This is the colored part of your eye.F: Eyelid Protects and lubricates our eyes.If yours is a little larger, you'll be nearsighted (myopic) if it's smaller, you're farsighted (hyperopic). E: Eyeball Measuring about 1 inch across in diameter.D: Crystalline Lens Just behind the cornea: it keeps the world in focus on your retina.Needs to be protected from accidents, infections or genetic defects. It is the first and most powerful lens in the eye's optical system. C: Cornea Covers the front of the eye.Keeps eyes moist and is first line of defense against infection. B: Conjunctiva A clear membrane covering the front of your eye and inner eyelids.Over time loses its elasticity (which is why we all eventually need reading glasses). A: Ciliary Muscle Creates focus by adjusting the shape of your eye.The independent vision specialists at or next to your local Pearle Vision EyeCare Centre are always ready to explain things in everyday terms. Their inner workings are miraculous, but don't be intimidated. Your eyes are one of the most intricate systems in your body. Here's a handy guide to the anatomy of your eye, so you can know what eye experts are talking about. ![]()
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