24/7 contact lenses are reusable contact lenses that may be approved for extended or continuous wear, including overnight wear, depending on the specific lens model. The term does not mean that every lens in this category can be worn continuously for the same length of time. Approved wearing schedules vary between products and should always be followed together with the recommendations from your optician or eye care professional.
What does 24/7 contact lens wear mean?
Some contact lenses are approved for extended wear, which can allow the lenses to remain in the eyes overnight for a limited number of nights. Other models may be approved for continuous wear for a longer period. The maximum wearing period is specific to each lens model and should not be assumed from the replacement schedule alone.
For example, a reusable lens may have a monthly or two-week replacement schedule without being approved for continuous wear for that entire period. Always check the wearing instructions for the exact contact lens you use.
Extended wear and continuous wear are not the same
Extended wear and continuous wear describe how long a particular contact lens may be worn before it needs to be removed. These terms are separate from how often the lens itself should be replaced. Different lens models can therefore have different approved wearing schedules even when their prescription parameters appear similar.
Choosing and reordering 24/7 contact lenses
Only wear contact lenses overnight if the specific lens model is approved for that type of wear and the wearing schedule has been recommended for you by your optician or eye care professional. When reordering, use the same lens model and prescription parameters prescribed or recommended for you.
Parameters such as power, base curve and diameter can vary between lens models. Our guide to contact lens parameters explains the most common values used when ordering contact lenses online.
Matching prescription values alone does not necessarily mean that another extended-wear or continuous-wear lens is a suitable replacement. Lens design, material, fit, replacement schedule and approved wearing schedule can differ between products.
Caring for reusable 24/7 contact lenses
If your lenses are removed and reused, follow the cleaning, disinfection and storage instructions for the specific lens and care product. Use a suitable contact lens solution and follow the manufacturer's instructions.
Do not extend the recommended wearing period or sleep in contact lenses unless overnight wear is permitted for your specific lens model and has been recommended for you by your eye care professional.