The crystalline lens is a complex structure of very fine fibres with delicately balanced chemistry of proteins, water and a small portion consisting of minerals. However if this balance is upset the lens can begin to become opaque. This can result from excess water in the lens, disturbance in the arrangement of the fibres, interference with the proteins in the lens and deposits of calcium compound and other substances thus resulting in a cataract. There are several types of cataracts and several different types. Cataracts can be congenital, acquired, traumatic or senile. Congenital cataracts are there from birth and until they are removed the child is blind. Diseases such as diabetes or exposure to radiation however often cause acquired cataracts. However traumatic cataracts are caused by a blow to the eye that sends a shockwave through the media of the eye causing tissue damage and tears in the material. Senile cataracts are found universally in many people over the age of 80 and are a part of the aging…
Nearby objects are clear but far objects are blurry and the eyeball has grown too long or the cornea is too steep in Myopia. And Hyperopia is and eye imperfection that is usually caused by the lens not being round enough or the eyeball is too short, with this close objects are blurred.…
1. The cornea controls and focuses light in the eye. The cornea is responsible for about 75 percent of the eye's focusing power. As light enter the eye, the cornea refracts it onto the retina to help the eye focus on objects.…
Diabetic Retinopathy, which is loss of vision and blindness, happens when tiny blood vessels grow in the eye, and the high concentration of glucose in fluid that are around the eye makes them fragile. Tiny bulges can be developed in the retina and it can develop in other areas in the eye, and if they start to leak or burst, the fluid and blood can spread throughout the eye. After it starts spreading, blood clot and scar tissue can start to form in front of the retina, which prevents light from hitting the retina, causing blindness. If the fluid is released it can cause swelling which leads to blurred vision. There is no treatment when this occurs ,but the prevention of the build up of glucose surrounding the blood vessels in the eye and the…
Eye floaters are specks of material that float around inside your eye. A jelly-like fluid (vitreous) fills the inside of your eye. The vitreous is normally clear. It allows light to pass through to tissues at the back of the eye (retina). The retina contains the nerves needed for vision.…
An ocular disease that affects the middle layer of the eye is Glaucoma. It damages the optic nerve fibers, when each fiber is damaged it creates a bigger damage, malfunction to no function of the optic nerve. Ultimately, once the entire optic nerve is damaged peripheral blindness results. High intraocular pressure is in great part what contributes to the damage caused by Glaucoma. Although high intraocular pressures indicate Glaucoma, thick corneas can also make the pressures seem high. Resting in our eye there is liquid, properly known as aqueous fluid, overproduction or poor drainage of it causes the optic nerve damage, many months of uncontrolled eye pressure can easily go unnoticed, this disease has no symptoms until it is too late. There…
Nike prescription sunglasses do many things. They correct your vision, protect your eyes from the sun, increase your comfort, improve your performance, and enhance your appearance. Reconciling these different things requires an informed purchase based on the facts instead of hearsay and myths.…
Normal vision changes that occur with aging consist of decreased visual acuity, lessened ability to adapt to darkness and dim light, decreased accommodation to see near and far objects, loss of peripheral vision, atrophy of lacrimal glands, and difficulty discriminating similar colors. Presbyopia is the inability to focus or accommodate due to a loss of flexibility of the lens, causing decreased near vision. Cataracts are also very common in older adults; they cause the eye to have increased lens opacity in which reduces visual acuity and causes glares. Macular degeneration is the leading cause of blindness in adults over the age of 65.…
Physical changes to the eye and changes in color vision are also reasons to visit an ophthalmologist because the doctor could diagnosis the eye problem.…
Young, J.S. (2008). Age related eye diseases: a review of current treatment and recommendations for low-vision aids. Home Healthcare Nurse, 26(8), 454-473. (Young, 2008)…
Being a doctor is both a rewarding and a challenging career. Physicians examine, treat, and diagnose patients and ultimately save lives. Doctors can practice general family medicine, internal medicine, or specialize in one area, such as pediatrics, cardiology, neurology, or gastroenterology. A doctor who practices internal medicine is called an internist. According to the American College of Physicians, “general internists handle the broad and comprehensive spectrum of illnesses that affect adults, and are recognized as experts in diagnosis, in treatment of chronic illness, and in health promotion and disease prevention” (“About Internal Medicine”). Many internal medicine doctors will serve as the primary care provider for their patients and…
For years, people with blurry vision have had the opportunity to see clearly and optometrists have made this possible. Some people may take their vision for granted, but the world would not be what it is today if all the people that wear glasses or contact lenses, which is over half of the people in the United States, did not have the chance to see everything around them clearly. The Optometry profession is dedicated to the prevention of blindness and the enhancement of visual function. Optometrists have the satisfaction of helping their patients care for the most highly valued human sense - sight. Optometrists, also known as "Eye Doctors" or "O.D.'s" , examine eyes to diagnose vision problems and eye diseases. They determine a course of…
The sharpness of vision gradually declines and focusing the eyes on some things close becomes difficult. Common eye disorders in the aging adult include: cataracts, glaucoma, macular degeneration, and diabetic and hypertensive retinopathy. My mother had macular degeneration and that lead to depression for my mom. She was unable to do the one thing she loved, such as reading, and without that she became depressed. She felt that with reading she could go anywhere her mind would take her and she was able to continue to learn. Not being able to read took a large portion of her life away.…
Color blindness is the inability or the decreasing ability to see color or the differences in colors. John Dalton wrote the first paper pertaining to Colorblindness called “Extraordinary facts relating to the vision of colours” in 1798. He himself was colorblind and originally named the disability daltonism.…
Many individuals who have low vision may have age-related eye disorders, such as; macular degeneration,…
