Good news for contact lens wearers - June 22, 2007
There's good news for lens wearers who had to give up their contacts because they're "heavy depositors." For reasons not fully understood, some people leave larger- than-average amounts of mucus like protein deposits on their lenses, shortening the life of the lens and causing discomfort. Now they can get lenses made of special protein-resistant materials that actually resist some deposits.
Even baby boomers unwilling to wear bifocals for presbyopia, a decrease in focusing ability that begins around age 40 and makes reading difficult, have contact lens options.
Bifocal contacts have been on the market for years but have disappointed many wearers because they don't work as well as their developers hoped. The problem was simple: Bifocal lenses are for people who are both nearsighted and farsighted, and you can't always fit two prescription needs into one tiny lens.
Again, technology has improved these patients' prospects, manufacturers say, but not as much as they would like. For now motivation is the key. Bifocal contact lenses are suitable only for those people who absolutely won't wear glasses.
There's a new sensibility, too, about extended wear soft lenses, approved for general use in 1981 and greeted by the media as the best thing since homogenized milk (or of course sliced bread).
Initially, their manufacturers said they could be left in place up to a month before removal for cleansing. But soon after the lenses' debut came reports that wearers were contracting frequent eye infections. All these innovations and advancements in technology have made the availability of cheap contact lenses for all.
Now, many eye doctors recommend that extended wear lenses be cleaned once a week.
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