Orthokeratology
What Orthokeratology Is and How It Works
Ortho-k lenses are made from rigid gas-permeable material that allows oxygen to reach your eyes while you sleep. The lenses have a reverse-geometry design that creates specific tear film forces on the corneal surface, leading to redistribution of the epithelial layer and temporary reshaping of your cornea.
This reshaping process is intended to be reversible, though some patients may experience mild discomfort during the initial adjustment period. While serious complications are rare, they can potentially cause lasting changes. The corneal reshaping is maintained as long as you continue wearing the lenses each night, but your eye will gradually return toward its original shape if you stop treatment.
We most commonly use ortho-k to correct nearsightedness, also known as myopia. The technique can also address mild to moderate astigmatism in many patients.
- Myopia up to certain prescription levels
- Astigmatism when combined with myopia
- Some cases of farsightedness, though this is less common and results vary
- Age-related reading vision in select patients using specialty designs, with less predictable outcomes
Most patients experience clear vision for the entire day after removing their lenses in the morning. The corneal reshaping typically holds for 24 to 48 hours, though individual results vary.
You may notice slight vision fluctuations later in the day during the first few weeks of treatment. Once your eyes fully adapt, the correction usually remains stable from morning until bedtime. The duration of clear vision depends on your prescription strength, how your corneas respond to reshaping, and the number of hours you wear the lenses each night. Some patients may notice end-of-day blur and may need backup glasses.
Unlike glasses or daily contact lenses, ortho-k allows you to go without wearing correction during waking hours. Compared to LASIK surgery, ortho-k is intended to be reversible and does not permanently alter your cornea through surgical means.
Ortho-k may be appropriate if you participate in sports, work in dusty environments, or prefer not to wear correction during the day. For children and young adults with progressing myopia, ortho-k may offer additional potential benefits.
It is important to understand that sleeping in contact lenses carries a higher risk of serious corneal infection compared to wearing daily lenses only while awake. Strict hygiene practices and regular follow-up visits reduce this risk but do not eliminate it.
Determining If You're a Candidate for Ortho-K
Ortho-k typically works best for patients with mild to moderate myopia. We generally recommend it for prescriptions up to about -6.00 diopters of nearsightedness and astigmatism of -1.75 diopters or less.
Higher prescriptions may still respond to treatment, but the results are often less predictable and may require more frequent lens wear. Some patients with higher prescriptions experience residual daytime blur and may need backup glasses or occasional daytime top-up wear. Our eye doctor will evaluate your specific prescription to determine if ortho-k is likely to meet your vision goals.
Children as young as eight years old can be good candidates for ortho-k if they demonstrate the maturity to handle lens care safely. For younger patients, parental involvement in lens care and hygiene is essential. Maturity and ability to comply with hygiene routines are more important than age alone. Many parents choose this option because current evidence supports a potential role in slowing myopia progression in young people.
Adults of nearly any age can benefit from ortho-k as long as they have healthy eyes and realistic expectations. Older patients who are not ready for surgical correction may find ortho-k a suitable option.
You need healthy corneas and stable tear production to be a good candidate. We will thoroughly examine your eyes for any conditions that could interfere with safe lens wear.
- Chronic dry eye, blepharitis, or meibomian gland dysfunction may make ortho-k uncomfortable or unsafe
- Active eye infections must be resolved before starting treatment
- Corneal disease, scarring, recurrent erosions, or keratoconus typically disqualify candidates
- Severe allergies, significant ocular surface disease, or immunosuppression may create complications
- Uncontrolled diabetes or conditions that impair healing increase risk significantly
Your ability to comply with daily hygiene routines and regular follow-up visits is also essential for safe ortho-k wear.
Your daily routine and personal habits play an important role in ortho-k success. Ideal candidates have consistent sleep schedules and are committed to nightly lens wear and daily cleaning routines.
Athletes, pilots, military personnel, and others who face restrictions on daytime eyewear often find ortho-k particularly beneficial. If you spend long hours in front of screens or in environments where glasses fog up or contacts dry out, ortho-k may be a suitable option for you.
Some patients are better suited to other vision correction options. If you have an irregular sleep schedule that prevents consistent overnight wear, conventional contact lenses might work better for you.
We may suggest LASIK or other refractive surgery if you want a permanent solution and are not concerned about reversibility. For patients with very high prescriptions or complicated astigmatism, glasses or specialty daytime contacts may provide more reliable results.
For myopia management in children and young adults, we also discuss other evidence-based approaches including low-dose atropine eye drops, multifocal soft contact lenses, myopia-control spectacle lenses, and lifestyle measures such as increased outdoor time and reduced near-work demands. We will help you understand the options that best fit your needs.
The Fitting and Evaluation Process
We begin with a complete eye examination to assess your overall eye health and measure your current prescription. This exam includes tests of your visual acuity, eye muscle function, and internal eye structures.
We will also evaluate your tear film quality and quantity, check for any corneal irregularities, and discuss your vision goals and lifestyle needs. This comprehensive evaluation helps us determine whether ortho-k is appropriate for you.
Corneal topography creates a detailed map of your cornea's shape and curvature. We use advanced imaging technology to capture thousands of measurement points across the corneal surface.
- The scan is quick, painless, and non-invasive
- We use the data to design lenses customized to your unique eye shape
- Follow-up scans show how your cornea responds to treatment
- Repeat topography helps us fine-tune your lens parameters
Based on your corneal maps and prescription, we will order custom lenses designed specifically for your eyes. At your fitting appointment, we will teach you how to insert, remove, and care for your lenses.
You will practice handling the lenses under our supervision until you feel comfortable with the process. We will check the fit on your eyes to ensure the lenses center properly and move appropriately with each blink.
Your first follow-up visit typically occurs the morning after your initial night of lens wear. We will check your vision, examine how your corneas are responding, and assess lens fit.
Additional visits are usually scheduled at one week, two weeks, one month, and three months. We may adjust your lens parameters if the reshaping is not progressing as expected or if you experience comfort issues.
Many patients notice improved vision after just one night of wear, though full correction usually takes one to two weeks. The timeline depends on your prescription strength and how quickly your corneas respond to reshaping.
During the adjustment period, your vision may fluctuate throughout the day as your corneas adapt. We may provide temporary glasses or soft contact lenses to use during this transition if needed.
Wearing and Caring for Your Ortho-K Lenses
Always wash and dry your hands thoroughly before handling your lenses. Place the lens on the tip of your index finger and check that it is clean and free of debris.
- Pull your upper eyelid up and lower eyelid down with your other hand
- Look straight ahead and gently place the lens on your eye
- Release your eyelids slowly and blink gently
- Check in the mirror that the lens is centered
- Repeat the process with your other eye
Never swim, shower, or expose your lenses to any water while wearing them. Water exposure, even from tap water, significantly increases your risk of serious eye infection, including infections that can threaten vision.
Remove your lenses after waking and blinking normally to redistribute your tear film. Perform removal in a clean, well-lit area over a clean towel, after washing your hands thoroughly. If the lenses feel tight, instill lubricating drops before attempting removal.
Use a small plunger designed for rigid lenses, or learn the pinch technique if you prefer. Plungers should be used only after proper training by our office. Keep the plunger clean and dry, and do not share it with others. Look to the side, hold your eyelids open, and gently break the seal between the lens and your eye. Do not force removal. If a lens will not move after lubrication, contact our office for guidance.
Clean your lenses immediately after removal each morning while they are still moist. Use only the cleaning and disinfecting solutions recommended by our office, as not all products are safe for ortho-k lenses.
- Follow the exact prescribed system, whether daily cleaner plus disinfectant or hydrogen peroxide system, and do not mix brands or skip steps
- Do not use saline solution alone to disinfect lenses
- Never rinse lenses or the case with tap water
- Rub each lens gently for at least 20 seconds as directed, rinse thoroughly, and place in fresh disinfecting solution
- Replace the solution every time you store your lenses and never reuse or top off old solution
Store your lenses in their case filled with fresh disinfecting solution during the day. Keep the case in a clean, dry location away from bathroom moisture and contaminants.
- Rub and rinse the case with disinfecting solution, never tap water, before refilling
- Allow the empty case to air dry face down with caps off between uses
- Replace your lens case at least every three months or as directed
- Never reuse or top off old solution
- Keep backup solution and supplies on hand
Ortho-k lenses typically last one to two years with proper care. We will monitor your lenses at each visit for signs of wear, deposits, or warping that could affect performance or eye health.
You may need earlier replacement if you develop protein buildup that cannot be removed, if the lenses become scratched, or if your prescription changes. Always keep a backup pair available in case of loss or damage.
What to Expect with Ortho-K
You may notice mild lens awareness when you first close your eyes at night, similar to the feeling of an eyelash. This sensation usually fades within a few nights as your eyelids adapt.
Some patients experience slight glare or halos around lights during the initial adjustment period. These visual effects typically diminish as your corneas stabilize and your brain adapts to the new corneal shape.
Your vision should remain sharp and stable throughout most of the day once you complete the adjustment period. Some patients notice their vision is sharpest in the morning and slightly softer by evening.
Temporary fluctuations are normal, especially in the first month of treatment. If your vision becomes significantly blurred or uncomfortable at any time of day, contact our office for evaluation.
Missing one night of lens wear will not harm your eyes, but your vision may be slightly blurrier the next day. The corneal reshaping begins to reverse within 24 hours without lens wear.
If you miss multiple consecutive nights, you may need to wear glasses or daytime contacts until you resume regular ortho-k wear. Your vision should return to its corrected state after one or two nights back in your lenses.
After your initial series of visits, we typically recommend check-ups every three to six months. These routine appointments allow us to monitor your eye health, assess lens condition, and confirm that your vision correction remains stable.
We will perform corneal topography periodically to ensure your corneas are responding appropriately. If you experience any changes in vision quality or comfort between scheduled visits, we may ask you to come in sooner.
Most patients who commit to nightly wear and proper lens care enjoy years of successful ortho-k treatment. Consistency is the key to maintaining clear daytime vision.
- Wear your lenses every night for best results
- Follow your cleaning routine without shortcuts
- Attend all scheduled follow-up appointments
- Report any concerns promptly to our office
- Update your lenses as recommended
Recognizing Problems and When to Seek Care
While serious complications are rare with proper care, you should know the warning signs that require immediate attention. Watch for any of the following symptoms:
- Eye pain that persists or worsens after lens removal
- Increasing redness or bloodshot appearance
- Light sensitivity or discomfort in bright light
- Sudden vision decrease or vision loss
- Discharge, excessive tearing, or persistent foreign body sensation
Any of these symptoms are not expected during normal ortho-k wear and need prompt evaluation by our eye doctor.
Call our office immediately if you experience eye pain that does not resolve quickly after lens removal. Do not wait until the next day if you notice sudden vision decrease, intense redness, or colored halos around lights.
- Remove your lenses immediately if you have pain or discomfort
- Do not resume lens wear until we have examined you
- Bring your lenses, case, and all solutions to your urgent visit
- Contact us the same day for any concerning symptoms
- Seek emergency care if you cannot reach us and have severe symptoms
If you lose or damage a lens, contact our office to order a replacement as soon as possible. We keep your lens parameters on file so we can quickly reorder your exact prescription.
You may need to wear glasses or daytime contact lenses temporarily while waiting for the replacement. If you have a backup pair of ortho-k lenses, you can continue treatment without interruption.
Mild dryness or irritation can often be managed with preservative-free lubricating drops used before lens insertion. If your lenses feel uncomfortable, we may adjust the fit or recommend a different cleaning solution.
Protein deposits that build up over time can usually be removed with enzymatic cleaners used weekly. If you develop persistent redness without pain, we will examine you to rule out allergic reactions or solution sensitivities.
Frequently Asked Questions
Current evidence suggests that ortho-k may help slow the progression of nearsightedness in children and teenagers, though the goal is to slow progression rather than stop it completely. The peripheral corneal reshaping appears to reduce the stimulus for eye elongation, though individual responses vary and we cannot guarantee results for every patient. Ongoing monitoring of eye growth and refractive changes is required. Depending on the specific lens and local regulations, myopia control use may be considered off-label and requires thorough informed consent.
Most people quickly adapt and sleep comfortably through the night without noticing the lenses. Any initial awareness typically disappears within the first week as your eyelids become accustomed to the lens presence.
You should never swim, shower, or expose your lenses to any water while wearing them, as this increases infection risk. Since you wear ortho-k lenses only while sleeping, this restriction does not affect most daily activities.
Your cornea will gradually return toward its original shape over days to weeks, and your vision will revert to what it was before treatment. The corneal reshaping from ortho-k is intended to be temporary, and you can resume wearing glasses or switch to other contact lens options.
We will monitor your prescription at regular intervals and can modify your lenses if your eyes change. For growing children, prescription changes are expected, and we will update your ortho-k design as needed to maintain clear vision.
Ortho-k is considered an elective vision correction procedure and is not typically covered by standard medical insurance plans. Some vision insurance plans offer partial reimbursement for contact lenses, which may apply to ortho-k, and flexible spending accounts can often be used for these expenses.
Getting Help for Orthokeratology
If you are interested in ortho-k or want to learn whether you are a good candidate, we encourage you to schedule a comprehensive eye examination with our eye doctor. We will evaluate your eyes, discuss your vision goals, and help you determine if orthokeratology is the right choice for your lifestyle and needs.