Eyeglass or Contact Lens Benefits Risk and Tips to Select Proper One

Eyeglass or Contact Lens Benefits Risk and Tips to Select Proper One

In the past, eyeglass lenses were made exclusively of glass; today, however, most lenses are made of plastic. Plastic lenses are lighter, do not break as easily as glass lenses, and can be treated with a filter to keep out ultraviolet light, which can be damaging to the eyes. However, glass lenses are more resistant to scratches than plastic ones. Eye problems, in general, tend to get overlooked in a crowd of broader health issues such as heart disease and cancer.


The cornea is the clear, dome-shaped “window” at the front of the eye. Disease, infection, injury, and other things can hurt the cornea. Treatments for corneal problems can be simple. You may just need to change your eyeglass prescription and use eye drops. Professional who makes and adjusts optical aids, e.g., eyeglass (Also called spectacles) lenses, from refraction prescriptions supplied by an ophthalmologist or optometrist. Contact lenses are worn directly on the cornea of the eye. Like eyeglasses, contact lenses help to correct refractive errors and perform this function by adding or subtracting focusing power to the eye's cornea and lens.

As we grow older, eyesight isn't what it used to be. Fortunately, eyeglasses or contact lenses can fix most garden-variety vision problems. With age comes the development of cataracts or clouding of the eye’s natural lens. Intraocular lenses (IOLs) traditionally have been used to replace the eye’s natural lens after its removal during cataract surgery. However, with the traditional IOLs, most patients still needed to wear glasses for reading and using the computer. This, however, may be changing. The eyeglasses also help blind patients with macular degeneration. Astigmatism also can be treated by the use of cylindrical lenses (eyeglasses or contact lenses).

National Institutes of Health (NIH) study has found that six percent, or 14 million, are visually impaired. Of these, more than 11 million have uncorrected visual impairment, such as nearsightedness. They need eyeglasses or contact lenses to improve their vision. This study found that most people who have a visual impairment could achieve good vision with proper eyeglasses or contact lenses. Eyeglasses are an intervention to improve a manifestation of aging, i.e. degenerating eyesight, and glasses pose few (if any) risks to physical health.

People who have more than one vision problem often need glasses with multifocal lenses. Corrective artificial lens implants give people who don't want to bother with eyeglasses or manual insertion of contact lenses another option to consider. Glasses correct refractive errors by adding or subtracting focusing power to the cornea and lens. The power needed to focus images directly on the retina is measured in diopters. This measurement is also your eyeglass prescription.

Monovision is a corrective technique used to treat people with presbyopia. The intent is for the person to use one eye for distance viewing and one eye for near viewing. Having each eye configured for different focusing distances can reduce or eliminate the need for eyeglasses or contact lenses.

Projected average employment growth reflects the steady demand for corrective lenses and eyeglass frames that are in fashion. Eyeglass guards or goggles also have been used to prevent sports eye injury. Sunglasses are a visual aid, variously termed spectacles or glasses, which feature lenses that are colored or darkened to screen out strong light from the eyes.

Optical scientists at The University of Arizona have developed new switchable, flat, liquid crystal diffractive lenses that can adaptively change their focusing power. Its great news for anyone with imperfect vision, for it opens the way for next-generation "smart" eyeglasses -- glasses with built-in automatic focus. Eyeglass lenses will know where to focus just like your auto-focusing camera does.

Every time you go out into the sun, your eyes can take a hit from UV-B rays. The good news is it's never too late to start protecting your eyes, because the lens change is probably from an accumulated dose over the years. Inexpensive, plastic sunglasses are good absorbers of UV-B. That's why everyone needs to get into the habit of protecting their eyes.

Correcting nursing home residents' poor vision not only boosts quality of life, it may lower risks for depression, U.S. researchers report.

A team at the University of Alabama at Birmingham studied 78 nursing home residents, 55 and older, who received eyeglasses one week after having an eye exam and 64 residents who received eyeglasses or contact lenses two months after an eye check-up. The residents' vision-related quality-of-life and depressive symptoms were assessed at the start of the study and again two months later.

"This study implies that there are significant, short-term quality-of-life and psychological benefits to providing the most basic of eye care services -- namely, spectacle correction -- to older adults residing in nursing homes," the researchers concluded.” These findings underscore the need for a systematic evaluation of the factors underlying the pervasive unavailability of eye care to nursing home residents in the United States so that steps can be taken to improve delivery and eye care utilization."

Risk:

Injuries related to wearing glasses sent an estimated 27,000 people to the emergency department. Sports-related eyeglass injuries were more common in children 17 and younger. But the researchers say that such injuries could be avoided if people would wear protective eyewear during activities that put them at high risk of eye injury.

Researchers at the Columbus Children's Research Institute (CCRI), at Columbus Children's Hospital, say that among children ages 2 to 9, falling was the leading cause of eyeglass-related injuries (55 percent).The study also found that boys and girls were equally likely to suffer eyeglass-related injuries, at 53 percent and 47 percent of incidents, respectively.

A seminal study conducted by Lord, Dayhew & Howland (2002) found that multifocal glasses in individuals aged 63-90 impair depth perception and edge-contrast sensitivity and multifocal lenses were observed to double the risk of falling. If we are to adequately address this risk in falls prevention programs it is crucial to understand the process of adaptation to multifocal lenses. They documented that the new use of bifocals in able-bodied individuals can play a contributing factor in gait with the potential to increase the risk of falling, even in a relatively young set of subjects.

Data from a national survey suggest that an estimated 60 million American adults are at high risk of vision loss, according to a report published in this year issue of Archives of Ophthalmology, one of the JAMA/Archives journals. Of those adults, one in 12 cannot afford eyeglasses when needed, and about one-half do not get dilated eye examinations on a yearly basis.

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