Lens cases are small containers designed to hold and protect contact lenses when they are not being worn. They typically have two compartments, one for each lens, and are made from durable, lightweight materials. Most lens cases are airtight and waterproof, helping to keep the lenses clean and safe from damage or contamination. Proper care of lens cases is essential for maintaining eye health. Users should regularly clean their lens cases with a solution recommended for contact lenses, and replace the case every three months or as advised by their eye care professional. This helps prevent the growth of harmful bacteria that can lead to eye infections.