Quote:
Originally Posted by luvbostonxo2's
agreed.. a lens is a lens a lens.
protein, lipid and mucin deposits that are bound into the lens matrix determines how long a patient can wear ANY disposable soft lens.
This can easily be determined by a slit lamp observation!
MY honest opinion is that its a marketing issue. Frequent lens disposal also means frequent re-orders.
for most average wearers with a healthy tear film they MAY last longer but there are other factors such as tear film, wearing environment, allergies, chemical fume exposure etc that can determine how long a lens can be worn without being changed.
the same lens with someone that works in a hair salon with hairspray and chemicals in the air may last 2 weeks while the same lens on someone in a office may wear it for over a month.
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Thank you for explaining all that, luvbostonxo2's. I've always wondered why
contact lenses had a certain life time. As an eye care professional, what is you reaction to the posts from people who say things like "I'm supposed to change these lenses every week, but I've worn them for a month or even six weeks before and my eyes are fine." Does that sort of thing make you nervous like it does me?