Soft contacts are the most common. They are made of a flexible plastic type material that allows oxygen to reach the cornea (the clear surface covering our eyes.) Most are disposable, though some aren't. Soft contacts are easier for most to get used to, with a high level of initial comfort, in comparison to hard contacts. Also, some can offer UV protection!
Disposable contacts are soft lenses intended to be worn for a limited amount of time and then discarded, either daily, weekly, bi-weekly, or monthly. The limited use prevents protein deposits from building up on the lenses, which can impair vision, comfort, and even eye health. They are convenient and require no, or minimal, maintenance. The risk of infection is higher if worn longer than the recommended amount of time.
Rigid gas permeable (RGP) lenses, known as "hard contacts," allow more oxygen to pass through the lens to the cornea than soft contacts. Patients report clear vision with crisp detail. RGP contacts may potentially aid to slow down the development of nearsightedness, and can successfully treat astigmatism. Another advantage of RGP contact lenses is that they are durable and easy to clean.