Cleaning contact lenses involves treating your lenses after wearing them with a solution designed to remove deposits. Whilst you are wearing them, proteins from your tears, oils from your skin, dust particles and other contaminants adhere to the lens surface. If you leave these deposits on the lenses, they can become cloudy and feel less comfortable.
There are various types of contact lens solutions, each with its own method of use. All-in-one solutions for soft lenses combine cleaning, disinfecting, rinsing and storage in a single bottle. You rub the lens briefly between your fingers with the solution, rinse it off and place the lens in a clean case filled with fresh solution. Peroxide solutions work using hydrogen peroxide, which dissolves organic residues whilst also disinfecting; after a neutralisation period of at least six hours, the solution is safe for your eye. Saline solutions are intended for rinsing and flushing, but do not clean or disinfect the lenses themselves.
Mechanical rubbing of the lens, also known as manual cleaning, is an important part of most cleaning systems. By gently moving the lens back and forth between your thumb and forefinger with a few drops of solution, you help to loosen deposits that would otherwise stick to the lens material.