Maintaining healthy eyes is something that is important at all stages of life, but can be especially beneficial as a protective measure to combat the effects of aging and the impact of free radicals.
Understanding the Structure of the Eye. Your eyes are complex structures, so much more than just “eyeballs”. The eyes sit in orbital sockets, and are attached to six muscles that help the eyes rotate. These muscles are attached to the white part of the eye, which is called the sclera – a strong layer of tissue that covers most of the eye. Within the orbital sockets as well are the lacrimal gland, the glands that produce tears to lubricate your eyes.
As far as the eyeball itself, the surface and interior are comprised of multiple parts. The parts of the eye work together to help you see, each individual structure playing a key role in the focusing of light into images.
Cornea. The cornea is the transparent, dome-shaped front part of the eye that covers the iris and pupil. We see objects when light is reflected off of them, and that light enters the eye through the cornea. Just behind the cornea is the anterior chamber, which is filled with fluid called aqueous humor. This fluid keeps our eye nourished and helps maintain its structure.
Pupil. The pupil is that dark opening in the center of our eye – it is shaped like a circle in humans, and like a slit in some animals. The pupil regulates the amount of light that enters the eye.
Iris. The iris is the colored part of the eye, and it contains muscles that control the width of the pupil. The muscles in the iris can dilate or constrict the pupil to control the amount of light that reaches the back of the eye.
Lens. The lens is located behind the pupil, and is responsible for focusing light towards the back of the eye. The lens can change shape to help the eye focus on objects.
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Retina. Between the lens and the retina is the vitreous cavity, which is filled with a gel called vitreous humor. Light waves that are focused by the lens and the cornea pass through the vitreous humor and onto the retina. The retina, located at the back of the eye, is a lining of light-sensitive tissue that changes light waves into electrical signals.These electrical signals travel along the optic nerve to the brain, and are interpreted by the brain as images. The retina consists of photoreceptor cells, which contains two types of proteins; rod opsins and cone opsins. Opsins absorb light particles to be transmitted as the electrical signals the brain uses to construct images. Rod opsins perceive black and white, and allow us to see at night. Cone opsins perceive color, and allow us to see in detail. Macula. The macula is a small, yellow spot in the center of the retina that provides detailed vision through sharpness and color perception. It is responsible for centralized vision, whereas the other part of the retina provides us with peripheral vision. In healthy eyes, these distinct structures of the eye work cohesively together to enable clear vision. The degradation of any one of these components may inhibit vision and weaken our eyes. This can occur naturally as we age, or as a result of oxidative stress caused by free radicals.
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Vision Supplements With Lutein And Zeaxanthin Isotonix®, the world’s most advanced nutraceuticals, offers a wide selection of dietary supplements to promote overall well-being, while also narrowing the focus on specific areas of health.*These statements have not been evaluated by the Food and Drug Administration. This product(s) is not intended to diagnose, treat, cure or prevent any disease.*