Monthly lenses are a type of contact lens designed to be worn for up to 30 days. After this period, they should be replaced with a new pair. These lenses are made from materials that allow oxygen to pass through, helping to keep the eyes healthy and comfortable. They are available in various prescriptions and can correct vision issues like nearsightedness and farsightedness. To maintain eye health, it's important to clean and store monthly lenses properly. Users should follow the instructions provided by their eye care professional and the lens manufacturer. Regular check-ups with an optometrist can ensure that the lenses fit well and meet the user's vision needs.