For any given substance, the heat capacity of a body is directly proportional to the amount of substance it contains (measured in terms of mass or moles or volume). Doubling the amount of substance in a body doubles its heat capacity, etc.
Conventional soft contacts can last up to a year; conventional rigid gas permeable (RGP) contact lenses can last even longer. Frequent or planned replacement contact lenses last one to several months. Disposable contacts last from one day (daily wear) to up to two weeks (extended wear).
Rating Newest Oldest. Best Answer: I wear the acuvue oasis contacts and have been wearing contacts for the past 8 years. I have always been told to change my contacts every 2 weeks. So in theory, 1 box of 6 lenses would last you 3 changes aka 6 weeks. If you have one box for each eye, it should last you 12 weeks or 3 months. I just looked on my boxes, and it doesn't say anywhere on there how long to wear them.