Contact lens solution is a liquid used to clean, disinfect, and store contact lenses. It helps remove dirt, debris, and proteins that can accumulate on the lenses, ensuring they remain safe and comfortable to wear. There are different types of solutions, including multi-purpose solutions, which can clean, rinse, and store lenses, and saline solutions, which are primarily used for rinsing. Proper use of contact lens solution is essential for maintaining eye health and preventing infections.