Prescription lenses are specialized optical lenses designed to correct vision problems such as nearsightedness, farsightedness, and astigmatism. They are made based on an individual's specific vision needs, which are determined through an eye examination by an eye care professional, such as an optometrist or ophthalmologist. These lenses can be made from various materials, including plastic and glass, and can be coated for additional benefits like scratch resistance or UV protection. Prescription lenses can be fitted into different types of eyewear, including glasses and contact lenses, to help improve clarity and overall vision quality.