Orthokeratology lenses are designed primarily to:

Orthokeratology lenses are specifically designed to be worn during sleep to reshape the cornea temporarily. This process is known as corneal refractive therapy (CRT). When the lenses are worn overnight, they gently flatten the cornea, which can help reduce myopia (nearsightedness) and sometimes hyperopia (farsightedness) when the lenses are removed. The key aspect of this method is that it provides effective vision correction without the need for glasses or contact lenses during the day.

The unique benefit of orthokeratology is that it allows individuals to have clear vision throughout the day after the lenses have been removed, as the cornea retains its new shape even after the lenses are taken out. This is particularly appealing to people who do not want to wear corrective lenses during their everyday activities. The ability of these lenses to reshape the cornea while the person is sleeping is what distinguishes them from regular contact lenses, which are meant for daily wear and do not alter the corneal shape.