> not recommended by the manufacturer or eye doctor
I never found a technical explanation of why you shouldn't reuse dailies after overnight cleaning. I looked at papers, manufacturers' websites, and spoke to two ophthalmologists.
Though not a safety issue, my own experience is that dailies are more fragile than long-term lenses. (Could this be deliberate?) They fit less comfortably after a week of reuse. Also, they sometimes develop a very tiny nick at the periphery after many days; when that happens you feel it the moment you put it in.
My rule of thumb is that I reuse dailies for 5 days--disinfecting each day of course--and throw them out. The ophthalmologists, who are friends and can speak freely with me, agree that my regimen is fine.
Dailies are more comfortable because they are softer and more porous. That lets more oxygen through and reduces irritation. But it also makes them less resistant to scratches and tears. That's why the manufacturers say you shouldn't clean and reuse them.
Source: my sister manages an optometrist's office.
My personal belief is that since they are made more fragile (I believe it's intentional), you risk the contact tearing while in your eye or not keeping the shape which could maybe cause a deformation to your cornea/eye(?) if used for a prolong time. I only think this because I always swam with my 2 week disposables in and my eye doctor got 'angry' when he saw my contacts were a little deformed from water exposure.
I never found a technical explanation of why you shouldn't reuse dailies after overnight cleaning. I looked at papers, manufacturers' websites, and spoke to two ophthalmologists.
Though not a safety issue, my own experience is that dailies are more fragile than long-term lenses. (Could this be deliberate?) They fit less comfortably after a week of reuse. Also, they sometimes develop a very tiny nick at the periphery after many days; when that happens you feel it the moment you put it in.
My rule of thumb is that I reuse dailies for 5 days--disinfecting each day of course--and throw them out. The ophthalmologists, who are friends and can speak freely with me, agree that my regimen is fine.