As children grow and develop, their visual acuity and clarity can change. Assessing a child's vision accurately and obtaining help and support as needed can help them to become more independent and interact with the world more confidently....
Numerous diseases may be caused by eating an unhealthy diet. According to the Wrong Diagnosis website, a diet lacking in certain vitamins can cause many medical conditions to manifest. An unhealthy diet is a diet in which not enough nutrient-rich...
Vertigo falls into two major categories: peripheral and central. Conditions of the central nervous system relate to central vertigo, but problems of the inner ear cause peripheral vertigo. Peripheral vertigo is more common, as issues such as...
Difficulty in seeing text up close is called presbyopia and is typical after the age of 40. In 1959, the introduction of the progressive bifocal lens, also called the no-line bifocal lens, by Bernard Maitenaz gave the public the option of an...
According to "Foundations of Cellular Neurophysiology," the human visual system requires about 30 percent of the body's oxygen and about 25 percent of its nutrient intake to function properly. Nutrient-deficient diets and inactive lifestyles...
You know that feeling you get during the day when you can't seem to keep your eyes open. You may be at work or in front of the computer at home or watching TV. It could simply be your eyes telling you that they're tired and that has manifested in...
A cataract describes a clouding of the eye lens, which focuses images on the nerve tissue at the back of the eye. A significant cataract causes loss of visual clarity and dimmed vision. The definitive treatment for a cataract is the removal of the...
Although it's possible to have lovely skin at any age, skin care becomes a bit more challenging once you reach the age of 50. Natural oil production decreases after menopause, and the skin becomes drier and more fragile, states Dr. Rosemarie...
Bicycles are a great transportation option. Like cars, planes and motorcycles, they help you move from place to place faster than you could be just walking. But unlike these other quick forms of transportation, they do not come with built-in...
Contact lenses provide flexibility eyeglasses cannot give to those with vision issues. There are a variety of lenses manufactured for a variety of sight problems, as well as for cosmetic purposes. Almost everyone is now a candidate for some type...
Night blindness, or nyctalopia, is rare in the United States; however, according to the Mayo Clinic, it is a concern in developing countries where malnutrition is common. Night blindness is characterized by the inability to see clearly in poor...
Though walleye are not native to Washington, they have gathered a growing following in the state since their mysterious introduction sometime in the mid-20th century. Walleye can reach impressive sizes and are known as one of the tastiest fish in...
Bifocal lenses take some adjustment for many people, whether you start with bifocals or switch from regular lenses. New bifocal wearers might experience difficulty as they move from looking through the top to the bottom of the lenses. The bifocal...
The 2006 Nasdaq-100 Open played in Miami, Florida, marked the first professional tennis tournament in which players were given the ability to "challenge" an initial ruling made by an official with use of instant replay. The initial ruling or...
Young children and infants can't tell parents about vision problems and, in most cases, when a child has an eye problem from birth, he may not know his eyesight could appear differently. Checkups with a pediatrician may not detect subtle eye...
With typical outputs of 10 to 20 lumen, flashlights pose little or no threat to the eyes. One reason for this is the built-in defense ability that the eyes possess. Through the coordinated efforts of the pupil, iris, retina and the optic nerve,...
A human eye and a camera have many similarities. The Boston University Physics website explains that the eye's pupil and retina are similar to the shutter and film of a camera. The pupil and shutter regulate light and the film and retina record...
Vitamin A and D are fat-soluble vitamins. Your body has an ability to store vitamin A and D to compensate if your dietary intake falls short occasionally. If you do not consume enough vitamin A and D regularly, you may develop a deficiency in one...
The bilberry is a close relative of the blueberry and cranberry and is purported to have many health benefits. Bilberries are also known as European blueberries, whortleberries and huckleberries and can be eaten fresh or taken as a dietary...
Loss of eyesight is one of the most common complaints about aging. Almost everyone over the age of 40 will experience some degree of vision loss. For people who don't have cataracts, misshapen eyes, nearsightedness or farsightedness, or some other...
Vitamin A is needed by the body for vision, bone health, immune function and cell differentiation. Retinol is the most usable and active form of vitamin A and is found primarily in foods from animals including liver, milk and cheese. Beta carotene...
Eyes normally adjust well to changes in light by dilation or constriction of the pupil, which allows light to enter the eye. In some diseases, however, errors in development allow extra light to enter the eye or keep the eye from adapting to light...
According to the Mayo Clinic, the dark circles found under your eyes are caused by hyperpigmentation of the delicate skin surrounding your eyes. They have a variety of causes, including genetics, exhaustion and even dehydration. You can clear dark...
Vitamins are essential micronutrients necessary for specific metabolic functions in the body. In 1941, the National Academy of Sciences published the Recommended Daily Allowance, or RDA, for vitamins. The RDA is a determination of the healthy...
The Bushnell Legend Ultra HD 8x42mm binoculars are lightweight and are water- and fog-proof--perfect for birders who like to take treks to find the birds they wish to observe. They also come with a 100 percent money-back guarantee and a range of...
Bilberry has a 1,000-year history of use in traditional European medicine, according to the National Center for Complementary and Alternative Medicine. The fruit of this plant, which is a relative of the blueberry, can be eaten or made into...
It's likely that most people who see or hear the term "eye problems" imagine something awry with the delicate machinery of the eye itself -- for example, the cornea or the retina. In the same vein, when people imagine these problems they also...
Glaucoma is a group of diseases that, as described by the National Eye Institute, damage the optic nerve of the eye and result in blindness. Glaucoma has many different forms, but each variant causes damage to the optic nerve, usually via...
When you are told by your eye doctor that you need contact lenses, you may need to decide between hard contact lenses and soft contact lenses. Traditional hard contact lenses made from glass or polymethyl methacrylateas (PMMA) are mostly obsolete,...
