Hard contact lenses include two types of lens material — PMMA (conventional) lenses and RGP (rigid gas permeable) lenses. They are custom-made for each person and last longer than soft contacts. Summary Contact lenses are thin plastic lenses placed on the eye to correct vision problems., Monthly contact lenses may be a better option for your vision needs than daily contacts or glasses. Learn about the benefits and downsides here., What Are Extended Wear Contacts? Extended wear contacts are a relatively new and popular type of contact lens that can last from one to six days, or even up to 30 days. They may also be referred to as continuous-wear contact lenses. These lenses differ from daily, weekly, and monthly contact lenses, which must be taken out before going to bed., Contact-Specific Formula If you wear contacts, ensure the packaging indicates the solution is safe to use while wearing contact lenses. When in doubt, ask your pharmacist or eye care specialist if you’re meant to use the formula when your contacts are in. For example, only use preservative-free drops when wearing contact lenses., Choosing the right type of contact lenses can be confusing. Here's everything you need to know about multifocal and bifocal contacts., If your soft contact lenses leave your vision blurry or your eyes feeling dry by day’s end, rigid gas permeable (RGP) lenses might be the solution you're seeking. If your soft contact lenses leave your vision blurry or your eyes feeling dry by day’s end, rigid gas permeable (RGP) lenses might be the solution you're seeking. Unlike soft lenses, modern RGP lenses maintain clarity and comfort .