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Fast Fact
One of the great wonders of the human body is the ability of damaged cells to be repaired or replaced. Red blood cells, for instance, live for about 120 days. Each day, about 1% of your red blood cells retire to be replaced by a fresh generation. The lens of the eye is a notable exception. The cells of the lens of the eye are never replaced; the proteins of the lens are never replenished. The lens cannot repair itself; damage accumulates over a lifetime.
Cataracts are the result of gradually accumulating damage to the proteins of the lens. The most important source of this damage is exposure to ultraviolet (UV) radiation, especially while one is young.
Behind the lens lies the retina, the thin lining of the back of the eye. The retina is the eye's miracle. This patch of tissue, about the size and thickness of a postage stamp, is able to dissolve and create a new image every tenth of a second.
Today in the United States, retinal diseases are the leading cause of blindness. Macular degeneration, the accumulation of damage in the retina, is the leading cause of blindness from retinal disease. Slowly, over the years, the macula is irreversibly damaged by exposure to UV radiation. About one third of adults over age 65 experience this steady decline of central vision, not correctable by glasses.
Excessive exposure to sunlight during early childhood is harmful to the eyes. Sunlight contains harmful UV radiation.
The risk for retinal damage from the sun's rays is greatest in children less than 10 years old, although the consequences usually do not become apparent until well after they are adults.
All children should be taught to wear sunglasses, especially between 10 AM and 2 PM, when ultraviolet exposure is the most dangerous. This is true even for children with darker eye colors, even though their darker pigments afford partial protection. Of course, children with light-colored eyes need sunglasses all the more.
Ultraviolet exposure is at its peak when children are at high altitudes, snow-covered landscapes, bright sandy beaches, or near reflective bodies of water.
All sunglasses are not the same. Effective sunglasses should block both UVA and UVB radiation. The sunglasses must be measured to block 99% to 100% of UVA or UV400 (400 nm is the wavelength of UVA radiation). Thankfully, all sunglasses block UVB radiation.
Large lenses that fit close to the eyes are best. Those that block visible blue light are even safer.
Expensive brand names and polarizing lenses are no guarantee.
Ordinary sunglasses make the situation WORSE! The dark lenses cause the pupils to dilate, allowing more of the dangerous UVA radiation to damage the lens and the retina.
My 3-year old daughter is always complaining of pains in her legs during the night, could these be growing pains?
Shelly West - Kamiah, Indiana
During childhood, the human body goes through an amazing series of changes. When babies are born their heads, hands, and feet are proportionally much larger in relation to their bodies than at any other time in life. It's one of the things that make babies distinct and adorable. Throughout the growing up process, the human body changes proportions many, many times. Sometimes long, gangly arms and legs seem to shoot out over night! During these spurts of growth, children often complain of nighttime leg pain, hence the common label growing pains.
When children are plagued by episodes of recurrent, brief leg pain, it is a good idea for them to be checked once by a physician. If the physical examination is normal, with no redness, tenderness, swelling, or limitation of movement, and if the pain is not provoked by moving or associated with any abnormal gait, then this situation is what we often call growing pains. These pains typically occur at night with no resultant daytime disability. The actual source of the pain has never been proven, but long experience has taught us that they are benign and self-limited.
If the physical examination is not normal or the pain is associated with other symptoms, your doctor will be able to discuss in more detail other potential diagnoses such as chronic trauma, restless leg syndrome, and childhood arthritis.
In children with benign growing pains, the muscles or tendons are still a little too tight for the growing long bones. Muscle spasms lasting from 1 to 15 minutes cause the pain. Many of these children are unable to touch their toes with their fingertips without bending their knees.
During a pain episode, stretching the foot and toes upward will often resolve the muscle spasm. Gentle massage and moist heat over the painful spot can also help.
In most cases the pain can be prevented with simple, daily stretching exercises. These exercises must be continued even after the pain subsides in order to keep the muscles and tendons relaxed and able to accommodate the next growth spurt.
Some physicians recommend giving a glass of tonic water before bed. I have never seen any studies evaluating this suggestion, but it might help and wouldn't hurt. Plenty of fluids should make cramping less likely.
Although these painful occurrences of growing up are nothing to be worried about, like all of life's growing pains, they can be quite bothersome when in the middle of an episode. It is precisely the reshaping of ourselves that causes physical and emotional growing pains -- in both situations, the pain results in our becoming more mature people.
my four year old daughter wakes up in the morning complaining that her legs hurt really bad. so unlike the other question, where the three year old child was feeling the pain at night. is this the same thing?
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Comments
leg pain
my four year old daughter wakes up in the morning complaining that her legs hurt really bad. so unlike the other question, where the three year old child was feeling the pain at night. is this the same thing?