Orthokeratology lenses, also known as "ortho-k" lenses, are specialized rigid gas-permeable (RGP) contact lenses that are designed to temporarily reshape the cornea while the wearer sleeps. The goal of ortho-k is to reduce or eliminate the need for eyeglasses or contact lenses during the day for individuals with myopia (nearsightedness) and/or astigmatism. Ortho-k is also known as a form of myopia control especially for young children.

People who may be interested in using ortho-k lenses include:

• Children and teenagers with myopia who wish to reduce their dependence on glasses or contacts
• Parents who are concerned about their child(ren)'s myopia progression
• Adults who are active in sports or other physical activities and do not want to wear glasses or contacts during the day
• People who are looking for a non-surgical alternative to correct their nearsightedness or astigmatism
• Individuals who are not suitable candidates for laser eye surgery

It's important to note that ortho-k is not suitable for everyone, and it's recommended to consult an eye care professional to determine if it's a good option for you.