It is recommended that "daily" contact lenses are to be disposed of after about 8 hours of use. I understand that daily lenses are made from a different material than, say, monthly ones; they are softer and apparently not suitable for cleaning.
However, what stops me from buying a lens case, some sterilising lens liquid and simply storing them in the case for a couple more days?
I asked a salesperson at the opticians today, but they declined to answer, and have a financial bias.
I have tried it once before (I kept some of the solution the lenses came in, placed the lenses in it after a day's wear and used them the next day) and it I didn't feel that my eyes were irritated, though I did notice that they became drier faster than usual.
Why I shouldn't do this; what happens to the material/my eyes?