Can Overnight Lenses Offer a Non-Surgical Path to Clear Vision?

Correcting nearsightedness typically involves glasses, daytime contact lenses, or refractive surgery. However, orthokeratology—often shortened to Ortho-K— presents another approach. It uses specially designed contact lenses worn overnight to temporarily reshape the cornea. Among these options, Paragon CRT® lenses have become widely recognized in the field of non-surgical myopia management.

How Paragon CRT® Lenses Work

Paragon CRT® lenses are made from a gas-permeable material and are designed to be worn during sleep. As the user rests, the lens gently alters the shape of the cornea. By morning, this subtle reshaping allows light to focus more accurately on the retina, resulting in improved vision throughout the day—without the need for glasses or daytime contact lenses.

The correction is temporary and reversible, which means regular nightly wear is necessary to maintain visual clarity.

FDA Approval and Clinical Use

These lenses were the first of their kind to receive FDA approval for overnight wear. They are approved to correct up to -6.00 diopters of myopia and up to 1.75 diopters of astigmatism. Because they don’t involve surgery, Paragon CRT® lenses are often considered for children, teens, and adults who are not suitable candidates for laser-based procedures.

Their use has expanded internationally and is supported by eye care professionals trained in fitting Ortho-K lenses.

Suitability and Considerations

Paragon CRT® lenses are not ideal for everyone. A full eye health evaluation is required to determine if the patient’s eyes are suitable for overnight lens wear. Maintaining proper hygiene and attending regular follow-up appointments are essential to ensure safety and effectiveness. When used responsibly, they offer a non-invasive method of vision correction that aligns well with lifestyle needs.