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).
Contact lens prescriptions are more complex and may take more than one visit to finalize. Again, once the fitting is completed, we will provide you with a copy of your contact lens prescription. In general prescriptions for eyeglasses, sunglasses and contact lenses are valid for one year from the date written. We provide complete and convenient eyeglass and contact lens services in all offices and we also guarantee both the best price and your complete satisfaction on everything we do.