(Corneal Re-shaping Therapy)
Ortho-K lenses are rigid gas permeable contact lenses worn overnight while sleeping. This technique provides temporary correction of short-sightedness during waking hours. The contact lens gently reshapes the cornea (front surface of your eye) while you sleep. The wearer can then enjoy clear and natural vision when the lenses are removed upon waking, without the need for glasses or contact lenses.
We use a state-of-the-art corneal mapping technology to ensure accurate selection of lenses to provide you with the maximum glasses-free vision during the day.
It is suitable for mild to moderate myopia (short-sightedness) with or without astigmatism and mild hyperopia (long-sightedness). Ortho-K is a great choice for those participating in sport, particularly contact and water sports, those working in dusty or dirty environments, those who are contact lens intolerant due to dry eyes, allergies or environmental factors. It is also an alternative option to laser refractive surgery.
Short-sightedness tends to worsen quickly in childhood and adolescent years. Ortho-K lenses has been shown to slow down increasing short-sightedness when compared to glasses and contact lenses.
How Does Ortho-K Work?
Unlike ordinary hard or soft contact lenses, Ortho-K lenses have a flatter central curve than the curvature of the cornea. When worn during sleep, the flatter central curve drives the tear film under it to the periphery. This fluid force flattens the central cornea and steepens the peripheral cornea thereby correcting shortsightedness.
The lens is made from oxygen permeable plastic to ensure adequate oxygen gets through to the cornea during eye closure for normal metabolic functioning.
Improvements in vision can usually be seen the next day in those with mild to moderate short sightedness. With the high minus powers, it may take two to four weeks to stabilize. Stopping lens wear will result in the cornea reverting back to their former state within 1–4 weeks.
Regular visits are required to ensure optimal vision and centration of the lenses, and to minimize undesired complications.
Safety of Ortho-K
Ortho-K reshapes only the very front layer of the cornea called the epithelium. The corneal epithelium regenerates new cells every day and is renewed completely every 10-14 days. This versatility makes ortho-K a safe and reversible procedure.
Complications associated with Ortho-K are similar to soft contact lens wear. These include eye infections and irritation. This can be minimized by proper lens hygiene and regular follow-up.
Please contact us for more information on Ortho-K