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taking care; protecting your eyes - polycarbonate lenses

by:Cailong     2019-08-23
taking care; protecting your eyes  -  polycarbonate lenses
Susan Gilbert.
1988 this is a digital version of an article from The Times Print Archive, before it starts online in 1996.
To keep these articles as they appear initially, the Times will not change, edit, or update them.
There are occasional copywriting errors or other problems during the digitization process.
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This is the ninth place to go out twice at the Babe Ruth League Regional Championship near Albany.
The batsman hit a straight-line drive that bounced back and hit 11-year-
Right eye of second child base hand Justin metacarpa to he knocked down in.
When he arrived at the emergency room of a nearby hospital, his right face had swollen to twice the normal size and his vision was blurred.
The doctor thinks Justin's retina is falling off and says he may end up losing sight in his right eye.
One Saturday night Leonard Green played table tennis near his home in New Canaan, Connecticut.
When the ball hit his left eye.
Although his eyes were hurt, he finished the game.
The pain intensified over the next two days, and on Monday his eye doctor checked that Green had glaucoma, the main cause of blindness, usually associated with aging, but it may also be caused by a serious blow to the eyes.
Justin Metacarpa and Leonard Green are just two of the thousands of Americans who suffer eye damage every year.
An estimated 35,000 people were injured while exercising, and thousands more were injured by excessive exposure to ultraviolet rays in activities such as skiing, sailing, sunbathing, and the use of tanning machines.
Experts believe that 90% of eye injuries can be prevented by wearing eye protection equipment.
Goggles, masks and sunglasses.
But not all products designed to prevent eye injuries can do that.
There are few industry standards or government regulations to guarantee the quality of these devices.
What makes the problem even more complicated is that most amateur and professional athletes think that goggles and masks limit their eyesight, and in addition to that, they are unnecessary, unmanly and unattractive.
Advertising eye doctors say it is essential for people to protect their eyes when playing sports, especially baseball, basketball and racket sports.
Baseball is the most dangerous: almost half the sport
Children between the ages of 5 and 14 suffer related eye injuries while playing baseball.
The children are often hit by the ball when they hit the ball.
"When the pitch hits the kids, the kids don't have the skills to get out of the woods," said Todd Kumar, head of the National Society eye safety program, to prevent blindness.
AD a 12-year-
The old boy was able to pitch at 70 miles an hour.
Even at a smaller speed, baseball can cause bleeding in the eyes;
Corneal abrasions (
Clear outer layer of eyeball)
And separated retina, which is characterized by the separation of light.
The sensitive layer between the eyeballs.
Retinal detachment is the most serious of these injuries, as scar tissue is formed on the retina, resulting in deterioration of vision.
"For children, sometimes vision loss does not recover until a few years after injury," the doctor said. Paul F.
Vinger is an assistant clinical professor of ophthalmology at Harvard Medical School, treating patients at clinics in Lexington and Concord.
To protect young baseball players, research organizations evaluating various products the American Association for Testing and Materials released voluntary standards for face guards designed for batsmen in 1986.
The only thing that meets these standards is the home safety mask, a transparent mask made of a flexible plastic called polycarbonate.
Some small league groups have begun to ask players to wear these masks.
Among adults aged 24 to 70, the sport that caused the most eye injuries was squash and squash.
The balls used in these games can pass through the air at speeds of more than 100 miles per hour, and they are small enough to penetrate the eye socket.
The resulting injuries include glaucoma (excessive pressure in the eyes) and traumatic cataract (Crystal blur)
Part of the eye, focusing the light on the retina.
If not treated, these conditions often result in partial vision loss or even blindness, although surgery, medication or both can save sight.
There are many brand and style goggles designed for racket sports on the market, but not all of them provide enough protection.
Some people prefer to wear goggles without lenses as they divert the side blow without obstructing the central vision, but experts warn them.
"Goggles without lenses are useless because the ball can go straight through the opening," said N . "
James Carlson, the optometrist in Kirkland, washed up.
Until last June, he was chairman of the Sports Vision division of the American Society of optometrists.
As the tag shows, players should look for goggles that meet the safety standards set by the American Society for material testing. A. S. T. M. -
The approved goggles surround the eyes completely and are equipped with a polyester lens and are also suitable for basketball, which is the main reason for sports
Eye damage in adolescents
People and young people in their early 20 s
Eye doctors recommend that anyone wearing glasses can wear prescription goggles made of polycarbonate while exercising because glass or plain plastic lenses are too easy to break.
Maybe it's because very few professional athletes wear goggles.
Even those who are threatened with serious eye injuries in their careers
Sports writers pay special attention to them sometimes.
Polycarbonate glasses have become such as Jia Ba,
Jabbar, a star center for the Los Angeles Lakers, has been injured many times in his early career.
Chris Saab, the rookie third baseman of the Cincinnati Red Devils, played in the 1988 season
Star Games, compared to Abdul-
Jabbar with goggles
However, his "goggles" are just prescription glasses and have no effect --resistance.
If Justin Metacarpa and Leonard Green wear eye protection gear, they may not be hurt.
Justin has been lucky so far.
Within a few weeks after the accident, he recovered his eyesight and there was no problem for the next three years.
As for Leonard Green, neither glaucoma surgery has fully restored his peripheral vision, and his eyes still tire whenever he reads.
Compared to eye damage caused by exercise, little is known about damage caused by UV rays
Invisible light used in sun and tanning salons to penetrate and damage human tissue.
The doctor has not yet determined the exact dose of ultraviolet rays to the lens and retina, and the dose for each person may vary.
However, in a day of skiing, sailing or sunbathing, the amount of ultraviolet rays reaching the eyes is sufficient to cause temporary loss of vision and burning sensation, known as snow blindness or light cornea.
This situation is relatively small and disappears within a few days of treatment, but over-exposure to UV light after a few years can lead to severe degenerative diseases, which often lead to blindness.
Eye doctors suspect there is a link between exposure to sunlight and cataract, but this has not been confirmed by scientific research.
Animal studies have shown that daily exposure to sunlight over the years is linked to a disease known as amd, a disease of the retina that causes loss of central vision.
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Sunglasses are not necessarily UV protection.
The damage of light, because most only block some harmful light.
There are no government regulations that require sunglasses to provide full protection against UV rays, and only voluntary guidelines set by the National Institute of Standards, a private testing laboratory.
These guidelines allow sunglasses to absorb up to 40% uv-
Part of UVSpectrum-
There is also 30% UV rays.
Experts believe these standards are too loose.
Advertising adds confusion because of the lack of product information that helps consumers judge the quality of sunglasses.
Because a pair of glasses is high.
Pricing, as some researchers have found, does not guarantee maximum protection.
In addition, many people mistakenly think that the darker the lens, the more UV rays
They provide light protection.
But the chemicals that make the lenses determine their ability to protect the eyes from harmful light, not the color.
The New York State Legislature is considering a bill that requires all non-prescription sunglasses sold in the state to be labeled to show how protective they are.
The Food and Drug Administration did not immediately plan to label sunglasses sold nationwide.
In the absence of government regulations, eye doctors put forward several suggestions on how to protect the eyes from ultraviolet rays.
For those exposed to the sun is equivalent to walking outside during lunch time, protection may not be important, but before more people learn about the effects of UV rays, the doctor said, people should at least wear a hat or sunglasses to protect their eyes.
"If there is enough sun to burn you," said Dr. Hugh R.
Taylor, deputy director of the Dana preventive ophthalmology center at the Wilmer Institute at Johns Hopkins University, said, "protect your eyes.
"Anyone in the sun all day --
For example, skiing, sailing, climbing or fishing
Sunglasses that block UV rays should be worn.
Looking for glasses with A manufacturer's label indicates that they provide 100% protection against uv a and uv B.
People who already have sunglasses can have the optometrist treat them with a coating that shields all UV rays;
The price of this coating is generally around $25.
Finally, those who play baseball, basketball and other sports outdoors, just put on the transparent polycarbonate goggles and don't have to worry about the sun being hurt.
These not only transfer the speeding ball;
They also blocked all the UV rays.
The color of the goggles is also designed to reduce glare.
This will not affect their UV rays.
But it can make the player feel moving.
A few years ago, federal health agencies began to notice a sharp increase in the number of potentially severe eye infections associated with contact lenses.
In 1986, 135 cases of corneal ulcer were reported to the Food and Drug Administration, an increase from only 35 cases in the previous year.
Also on 1986, the Centers for Disease Control recorded 30 rare cases of amoeba-type inflammation that were unheard.
In contact
Mirror before 1985.
If not treated in time, both infections can lead to blindness.
Although only a small percentage of the more than 20 million Americans wearing contact lenses have been infected, the sudden increase in these infections has led to F. D. A. and the C. D. C.
Research reasons.
F last year. D. A.
It is reported that corneal ulcer is being expanded-
Wear lenses, designed to wear for one month at a time.
The researchers were unable to determine exactly why the lenses were so dangerous, but they offered two explanations.
One is the accumulation of bacteria and various contaminants behind the lens, rubbing the cornea, creating a tiny wound and then being infected.
Another explanation is that
Wearing the lens will prevent enough oxygen from entering the cornea, resulting in the formation of tiny cysts and the final infection. The C. D. C.
It was found that almost all of the people with amoeba-induced amoeba inflammation did not rinse and store lenses using sterile saline.
Sterilization is essential for the "soft" lenses that have become popular in recent years, as microorganisms tend to stick to the lenses.
For convenience, many people rinse the lenses with homemade distilled water and salt sheet solutions.
But the mixture is not sterile.
Due to the results of these studies, many eye doctors warn patients to remove the extended
Wear lenses once a week and use only saline solutions made specifically for contact lenses.
So far, the results have been mixed: the number of cases of corneal ulcer reported last year has dropped to 67, but the number of cases of amoeba cornea has tripled to 92.
Advertising these two infections can be treated if they are found early.
"If one of your eyes is red or sore ,"Oliver D.
Schein of the Massachusetts Eye and Ear Hospital in Boston said, "take both lenses out and see a doctor the same day. '' -S. G.
Susan Gilbert is a freelance writer and editor of Health magazine.
A version of this article was printed on page 6006006 of the National edition on October 9, 1988, with the title: be careful;
Protect your eyes
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