Understand
How do overnight lenses work?
An orthokeratology lens is a rigid, oxygen-permeable lens whose geometry is calculated from measurements of each eye. Worn overnight, it acts on the distribution of the cornea’s surface cells. This optical change is slight, controlled and reversible.
The lens is removed in the morning. Its effect generally lasts throughout the day, then gradually decreases if wear is stopped. The lenses therefore need to be worn regularly, following the instructions provided.
Studies conclude that, on average, orthokeratology slows eye elongation in children with myopia. Effectiveness varies from one child to another: it reduces expected progression but cannot guarantee that it will stop.
Indications
Who may benefit from this solution?
Orthokeratology may be considered for some children, teenagers and adults with myopia, with or without astigmatism, depending on the parameters of the eye. In children, it is often proposed as part of an overall progressive myopia management strategy.
The assessment includes checks of:
- the prescription and how it is changing;
- corneal shape and regularity using topography;
- the condition of the ocular surface and eyelids;
- the patient’s and family’s ability to follow the handling, hygiene and follow-up requirements.
Corneal disease, active inflammation, inadequate hygiene or certain handling difficulties may mean that another solution is more appropriate.
Your journey
A multi-stage fitting process
- Initial assessment.Vision, refraction, cornea and ocular surface are measured, together with axial length when relevant for progressive myopia.
- Design and collection.The lenses are selected or calculated, then the patient learns insertion, removal, cleaning and safety rules.
- First check-up.An early examination checks vision, lens centration and the corneal response.
- Adjustments and follow-up.Several check-ups may be required. Follow-up then continues to monitor effectiveness, eye health and myopia progression.
The fitting package starts at €160 and includes the initial examinations, fitting appointments, insertion and removal training, and follow-up consultations throughout the year. Lens prices are provided in a personalised quotation.
Realistic expectations
What results can I expect?
Vision often improves after the first few nights, then gradually stabilises. Additional correction may be helpful initially or in certain situations. Night-time halos, fluctuating vision or awareness of the lens may occur, especially at the beginning of the fitting process.
In children, follow-up is not based solely on dioptres. Axial length helps monitor eye growth and assess the response to treatment over time.
Safety
Hygiene and warning signs
Overnight wear requires meticulous hygiene. Wash and dry your hands, use only the prescribed products, replace the case as instructed, and never allow the lenses, case or accessories to come into contact with tap water, shower water or swimming-pool water.
if the eye is red and painful, if there is marked sensitivity to light, discharge or an unusual reduction in vision. Corneal infection is rare, but it can be serious and requires prompt treatment.
Never wear a damaged lens and do not alter wearing time yourself. Check-up appointments remain necessary even when everything feels fine.
