Keratoconus

The cornea plays a crucial role in our vision. It is the transparent tissue at the front of the eyeball where light enters the eye. Approximately 65% to 75% of the refraction of light occurs in the cornea. The cornea also protects against external threats and harmful UV radiation. However, this vital part of our eye is constantly under siege. The cornea faces oxidative stress daily due to its high exposure to light and intense metabolic activity. The main culprit is ultraviolet radiation from the sun, which triggers the formation of Reactive Oxygen Species (ROS). These harmful free radicals can wreak havoc on the cells if not kept in check by antioxidants. While the cornea absorbs all UVC and most UVB rays, UVA rays are primarily absorbed by the lens.

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The cornea is in front of the lens. It is a clear layer, seeming to lack substance.  However, it is comprised of multiple layers and groups of cells and proteins which are highly organized.

Unlike other parts of the body, the cornea does not contain any blood vessels to nourish or protect the tissue against infection. Instead, the cornea receives its nourishment from tears and aqueous humor, a fluid in the front portion of the eye that fills the chamber between the cornea and the lens. The cornea must remain transparent to refract light properly and enable clear vision. The presence of even the tiniest blood vessels can interfere with this process. To see well, all layers of the cornea must be free of any cloudy or opaque areas.
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The eyes are small, but they have many parts including the eyelids, sclera, cornea, lens, optic nerve and retina. We depend heavily on our vision. When something goes wrong, the eyes are disproportionately affected. For example, a senior at risk of heart disease is also at risk of an ocular arterial or vein occlusion. Also, the macula requires a yellow-colored nutrient (lutein and zeaxanthin) found in certain vegetables such as green leafy vegetables, red, yellow and green peppers, corn and eggs. And antioxidants found in fresh fruits and vegetables have been shown to reduce oxidative eye damage and eye disease.
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Inflammation is a factor in many eye diseases, and what you eat affects inflammation. Whenever major holidays comes along, we are tempted to eat special foods. Many of these treats are high in calories and sugar, which contribute to inflammation. While you don’t want to spoil anyone’s fun, you can choose to eat foods that are anti-inflammatory. At the end of this article, you will find tips for limiting the damage while still enjoying the holiday.
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Have you ever heard that your eyes need plenty of nutrition? It’s true, and research backs this up. But did you know that the Standard American Diet tends to be very low in some eye-essential nutrients? The eyes are the second most physiologically active part of our body (#1 is the brain). At Natural Eye Care, we believe the eyes require approximately 25% of the nutrients we take into our body, if we eat a healthy diet. Even though most Americans consume enough calories, we may still have poor nutrition for the eyes. No wonder Macular Degeneration, cataracts, glaucoma, optic nerve
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Cornea transplant surgery involves removing a damaged or diseased cornea, and replacing it with tissue from a deceased donor. All or part of the cornea may be replaced. In the United States, eye surgeons do approximately 33,000 corneal transplants (keratoplasty) per year. The surgery might be recommended if vision is seriously impaired by scarring from an injury, or eye diseases such as Fuchs’ Dystrophy, Lattice Dystrophy, or Keratoconus.

What is the Cornea’s Job?

The cornea is transparent tissue at the front of the eye. Its job is to protect the eye from damage. This tissue also absorbs oxygen and nutrients. Light enters through the cornea
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Keratoconus is a disorder of the cornea that causes visual distortion. Changes in the cellular structures of the cornea cause it to thin and bend into a pronounced cone shape, losing its normal gentle curvature. This leads to several types of visual distortion including blurring, halos around lights, and, in some cases, rapid vision loss. The signature sign of Keratoconus is the perception of multiple ghostly images, called monocular polyopia.

The causes of Keratoconus are not yet known, but one possible link is magnesium deficiency. Numerous
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This newly discovered anatomical structure is named for its discoverer, researcher Dr. Harminder Dua of the Department of Ophthalmology and Visual Sciences at the University of Nottingham in the UK. Dua stated that this major discovery will not only cause ophthalmology textbooks to be rewritten, but that this new knowledge will also make eye operations safer and simpler.

The cornea is known as the “clear window” of the eye. Dua’s Layer is a thin but tough structure, near the cornea’s bottom layer. Dua and his colleagues used a specialized technique while dissecting eyes to make this discovery. Previously, science had identified only five layers of the cornea. Dua found the new layer between the corneal stroma (the middle of the cornea) and Descemet’s membrane (the second-to-bottom layer of the cornea).
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