Age-Related Changes of the Human Eye (Aging Medicine)
Age-related Changes of the Human Eye - Cheap Books
Surgery may be needed in more serious cases of dry eyes. Tearing , or having too many tears, can come from being sensitive to light, wind, or temperature changes. Protecting your eyes by shielding them or wearing sunglasses can sometimes solve the problem. Tearing may also mean that you have a more serious problem, such as an eye infection or a blocked tear duct. In addition, people with dry eyes may tear excessively because dry eyes are easily irritated.
Your eye doctor can treat or correct both of these conditions. Eye diseases and disorders common in aging adults Cataracts are cloudy areas that develop in the lens in the front of the eye. The eye lens is clear like a camera lens. Cataracts keep light from easily passing through the lens to the back of the eye the retina , causing the loss of eyesight.
Cataracts usually form slowly, causing no pain, redness, or tearing in the eye. Some stay small and do not alter eyesight. If they become large or thick and have a significant impact on vision they can almost always be removed with surgery. Cataract surgery is very safe and is one of the most common surgeries done in the United States and around the world. During surgery, the doctor takes out the clouded lens and, in most cases, puts in a clear plastic lens, restoring normal sight if the eye is otherwise healthy.
Glaucoma is usually related to increased pressure inside the eye. If it is not treated, this condition can lead to permanent vision loss and blindness. Heredity is a significant risk factor for glaucoma, as is age, race, diabetes, and some medications. Glaucoma is less commonly caused by other factors such as a blunt object or chemical injury to the eye, severe eye infection, blockage of blood vessels, inflammatory disorders of the eye, and occasionally by corrective eye surgery.
Most people with glaucoma have no early symptoms or pain from increased pressure. To detect glaucoma, the eye doctor will examine your eyes to assess the appearance of the optic nerve, measure the eye pressure and test the visual field. Also some people can have damage to the eye from glaucoma, even with normal pressure in the eye. Treatment may include prescription eye drops, oral medications, laser treatment, or surgery.
Retinal disorders are a leading cause of blindness in the United States and in other developed countries. The retina is a thin lining on the back of the eye made up of cells that detect visual images and pass them on to the brain. Retinal disorders interrupt this transfer of images. Common ones include age-related macular degeneration, diabetic retinopathy, and retinal detachment. Age-related macular degeneration AMD.
The macula is the small central portion of the retina containing millions of nerve cells cones that are sensitive to light. This area of the retina is responsible for detailed vision, such as facial recognition and reading. AMD is characterized by the loss of cells in this area causing blurred central vision.
It contributes to vision loss but does not cause total blindness. If advanced, there is no cure but in early stages there is benefit from nutritional supplements.
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People with the more severe type of AMD may benefit from laser or injection of medication. Diabetic retinopathy. This disorder is a complication of diabetes. It occurs when small blood vessels stop feeding the retina properly. In the early stages of diabetic retinopathy, the blood vessels may leak fluid, causing blurred vision or no symptoms at all. As the disease advances, you may notice floaters, blind spots or cloudiness of vision. New blood vessels may grow and bleed into the center of the eye, causing serious vision loss or blindness. For diabetic swelling of the retina, drug injections and laser may improve or preserve vision.
age related changes of the human eye aging medicine Manual
In most advanced cases, laser treatment can prevent blindness. It is very important that people with diabetes have an eye exam with pupil dilation every year. Very importantly, the likelihood of diabetic retinopathy is significantly decreased with good blood sugar control. Retinal detachment.
Retinal detachment occurs when the inner and outer layers of the retina become separated. Without a retina, the eye cannot communicate with the brain, making vision impossible. Symptoms of retinal detachment include: a sudden appearance of spots or flashes of light; vision that appears wavy, as if you were under water; and a dark shadow anywhere in your field of vision.
With surgery or laser treatment, doctors often can reattach the retina and bring back all or part of your eyesight. Conjunctivitis happens when the tissue that lines the eyelids and covers the sclera becomes inflamed. It is sometimes called "pink eye" or "red eye. Conjunctivitis occurs in people of all ages and can be caused by infection, exposure to chemicals and irritants, or allergies.
Corneal diseases and conditions can cause redness, watery eyes, pain, reduced vision, or a halo effect. The cornea is the clear, dome-shaped "window" at the front of the eye. It helps to focus light that enters the eye. Allow All Cookies.
Atchison, and Barbara K. Pierscionek, "Modeling the power of the aging human eye," J. A 9 , Not Accessible Your account may give you access. Abstract A hypothesis is presented that may explain why the aging eye does not become myopic with age. Lens internal curvature effects on age-related eye model and lens paradox Stefano Giovanzana, Tanya Evans, and Barbara Pierscionek Biomed.
Modeling the mechanism of compensation of aberrations in the human eye for accommodation and aging Juan Tabernero, Esther Berrio, and Pablo Artal J. Wide-field schematic eye models with gradient-index lens Alexander V. More Recommended Articles.
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