Orthokeratology (Ortho-K) uses specially fitted contact lenses worn during sleep to temporarily change the shape of the front surface of the eye. Many suitable wearers can see clearly during the day without glasses or contact lenses. For children, Ortho-K can also help slow the progression of short-sightedness (myopia).
How does Ortho-K work?
The lenses gently reshape the cornea while they are worn overnight. The effect provides clearer daytime vision after the lenses are removed in the morning. It is temporary: regular overnight wear is needed to maintain the effect. How quickly vision improves, and how clear it becomes, varies from person to person.
Who might it suit?
Ortho-K can be considered for children whose myopia is progressing and for adults who would like freedom from daytime glasses or contact lenses. Suitability depends on the prescription, corneal shape, eye health and ability to follow the lens-care routine. An examination and specialist fitting are needed; it is not suitable for everyone.
Does Ortho-K stop myopia or cure short-sightedness?
No. Studies show it can slow myopia progression in many children, but it does not guarantee progression will stop. Its daytime vision effect is reversible if lens wear stops.
How soon will I see clearly during the day?
Some improvement can happen after the first night, but the time to reach stable daytime vision varies. We check the fit and vision at follow-up visits and explain what to expect for your prescription.
Is sleeping in Ortho-K lenses safe?
Any contact lens worn overnight carries a risk of infection. Careful cleaning, avoiding water on lenses, and keeping follow-up appointments help reduce that risk. If an eye becomes painful, red or sensitive to light, remove the lens and seek urgent eye care.
What is involved in fitting and follow-up?
We assess the eyes and map the corneal shape, fit lenses for your eyes, teach insertion, removal and cleaning, and check your vision and lens fit after starting. Follow-up visits remain important as your eyes and prescription change.
Book an eye examination to discuss whether Ortho-K is suitable.
