How long can most contact lenses be safely worn per day?

The duration most contact lenses can be safely worn per day is generally 8 to 12 hours. This range allows for adequate oxygen transmission to the cornea while minimizing discomfort and the risk of complications such as dryness or irritation. Wearing contact lenses for longer durations can lead to reduced tear exchange under the lens, potentially causing issues like hypoxia (oxygen deprivation to the cornea), corneal abrasion, or infection.

While some lenses are designed for extended use, adhering to the guideline of 8 to 12 hours helps ensure the health and comfort of the eyes. It is essential to follow the specific recommendations of eye care professionals, as individual tolerance to contact lens wear can vary.