Orthokeratology (night lenses): vision correction without glasses during the day
Orthokeratology allows for clear daytime vision without glasses or traditional daytime vision correction. A person wears special overnight lenses while sleeping. They remove them in the morning. Afterward, they can see without them for the rest of the day. This method is often chosen for nearsightedness, especially if sports, studies, and an active lifestyle are important.
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Who is orthokeratology suitable for?
This method isn't considered for everyone, but rather based on indications and examination. It most often helps with mild to moderate myopia. The doctor decides whether it's suitable or not based on diagnostic data. Let's look at who finds it particularly beneficial.
Orthokeratology for myopia and nearsightedness
The main indication is myopia, which is characterized by poor distance vision. Night correction provides clear daytime vision and also helps slow the progression of myopia. The degree to which this method is effective is determined by the doctor based on the examination results.
Night lenses for children and adolescents
Myopia in children often increases year after year, and this is a separate issue. Monitoring myopia progression is one of the reasons this method is chosen in childhood. Childhood myopia often stabilizes under the doctor's supervision, and the child can live without glasses during the day.
It's important to understand that this approach requires discipline. The child and parents must follow the care instructions and attend follow-up appointments at the appointed time. Under these conditions, the method works predictably and safely.
When is the method especially convenient for adults?
Adults choose orthokeratology lenses when glasses and daytime correction interfere with work or hobbies. This is especially true for athletes, people living in dusty conditions, and those who spend a lot of time driving. Vision is clear during the day, and in the evening, the night correction is put back on before bed.
This method is also appreciated by those who work at a screen and experience dry eyes in the evenings from regular daytime correction. It relieves the strain of daytime, making the day more comfortable without sacrificing clear vision.
How does the selection process work in our center?
We select night lenses step-by-step to take into account the unique characteristics of each patient's eyes. First, we'll list the steps, then we'll go into more detail:
- Initial consultation
- Vision and corneal examination
- Calculation and selection of parameters
- Training in care and wearing
- Monitoring results and adaptation
This process helps us select the corrective lens accurately and predictably. Below is what each step includes.
- Comprehensive diagnostics of vision and cornea During the appointment, we check your visual acuity and conduct a detailed examination of the cornea. We use keratotopography—a map of the corneal surface—and also assess the condition of the tear film. This data indicates whether the method is suitable and what the expected outcome will be.
- Individualized calculation of parameters Based on the examination results, the doctor makes a personalized selection and calculates parameters for your specific eye. There are no standard solutions here: everyone's cornea is different. Both visual clarity and wearing comfort depend on the accuracy of the calculation.
- Training on care and lens wearing Before dispensing, we demonstrate how to insert, remove, and store lenses. We explain the lens wearing schedule and hygiene rules, as failure to do so increases the risk of complications. Patients leave with an understanding of what to do each evening and morning.
- Adaptation monitoring and post-fit monitoring The first few nights are the adaptation period, when the eye gets used to the new correction. We schedule follow-up appointments to check the results and the condition of the cornea. If necessary, the parameters are adjusted for optimal results.
Benefits of orthokeratology
The method has several practical advantages that both adults and parents appreciate. These relate to both vision and everyday convenience. Let's examine the main ones individually.
Daytime vision without glasses or lenses
The main advantage is clear vision throughout the day without additional accessories. No need to wear glasses or adjust daytime vision correction. This is convenient at work, while traveling, and during any activity.
Monitoring the progression of myopia
In children and adolescents, this method helps slow the progression of myopia. This is important because high myopia increases the risk of future retinal problems. Therefore, night vision correction is seen as both a convenience and a way to reduce these risks.
Comfort for sports, study, and an active life
Without glasses or daytime prescription, it's easier to play sports, swim, and spend time outdoors. Nothing fogs up, falls out, or dries out by evening. This is a noticeable relief for active people and schoolchildren.
Comparison with other vision correction methods
| Criteria | Orthokeratology | Glasses | Soft contact lenses | Laser correction |
|---|---|---|---|---|
| Daytime visibility | Without accessories | With glasses | With daily correction | Without accessories |
| Is a daily accessory needed? | No | Yes | Yes | No |
| Method reversibility | Yes | Yes | Yes | No |
| Sports-friendly | High | Average | High | High |
| Care requirements | Daily care | Minimal | Daily care | None after healing |
| Age restrictions | Suitable for children | Any Age | Often starting in adolescence | Usually starting at age 18 |
Orthokeratology and glasses
Glasses are simple and safe, but they are always on the face during the day and limit side vision. Nighttime correction frees up the day completely. However, glasses remain a backup option if this method is not suitable for some reason.
Orthokeratology and soft contact lenses
Soft contact lenses are comfortable, but they are worn all day, and by evening, eyes often become tired and dry. The overnight method relieves this strain during the day. The choice between the two depends on lifestyle and eye condition.
Orthokeratology and laser correction
Laser correction provides lasting results, but it is irreversible and is usually suitable for patients aged 18 and older. The overnight method is reversible: if you stop wearing it, the cornea will return to its original shape. This is an important distinction for children and adolescents.
We always begin with a complete corneal and vision assessment: this is the only way to safely and accurately select overnight lenses. For the patient, this means predictable results, daytime comfort, and a clear monitoring plan. – ophthalmologist
General information
Safety, contraindications, and care
The method is considered safe when the correction is prescribed by a doctor and the patient follows the instructions. However, there are conditions in which wearing the lenses is postponed or stopped. Let's look at what is considered normal and when help is needed.
What sensations are acceptable during the adaptation period?
During the first few nights, a slight foreign body sensation is possible, which subsides within a few days. In the morning, vision is usually clear, but sometimes it doesn't stabilize immediately. This is part of the adjustment process, and the doctor will warn you about such sensations in advance.
If the discomfort intensifies day by day, this is a reason to consult a specialist. Normally, the adjustment process subsides and resolves over time. Therefore, it's important to monitor your sensations carefully during the first week.
When to see a doctor
If pain, severe redness, photophobia, or a sudden deterioration in vision occur, remove the correction and consult a doctor. This also applies if the discomfort does not resolve within the usual adaptation period. It is better to see an ophthalmologist than to wait.
How to maintain corneal health
The most important factors are daily lens hygiene and clean hands when inserting lenses. Store them in fresh solution and change them according to the schedule prescribed by your doctor. A stable tear film is also important, so if you have severe dry eyes, choose your method carefully.
FAQ about orthokeratology
How long should I wear overnight lenses?
Can this method be used by children?
Do they require special care?
Can I go without glasses during the day after wearing overnight lenses?
When are results noticeable?
How to start selecting orthokeratology lenses
Getting started is easier than you think: just come in for a consultation and diagnostics. Below, we'll explain what will happen at your first appointment and how to prepare.
What will happen at your first appointment
The doctor will check your vision, examine your cornea, and assess whether the method is right for you. You'll receive an answer as to whether you can begin temporary vision correction with overnight lenses. If everything is OK, we'll discuss the parameters and next steps.
How to prepare for your consultation
If you wear soft daily lenses, the doctor will tell you how many days before your appointment you should remove them. Bring your previous eyeglass prescriptions, if you have any. This will help us more accurately assess your situation and choose the right non-surgical vision correction for your needs.
Russian Ministry of Health — Clinical Guidelines and Official Ophthalmology Materials
CyberLeninka — Orthokeratology Search
CyberLeninka - search on the topic of controlling myopia progression
CyberLeninka - search on the topic of contact correction and Complications
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What is orthokeratology and how do overnight lenses work?
This is a temporary vision correction method using rigid gas-permeable lenses worn only at night. While you sleep, they gently and reversibly change the shape of the cornea—the transparent front layer of the eye. In the morning, the correction is removed. The changed corneal profile remains throughout the day. The procedure is repeated in the evening. Thus, the effect is maintained day after day.
The principle of temporary corneal reshaping
During sleep, the lens redistributes the top layer of corneal cells and slightly flattens its center. This refocuses light rays on the retina, resulting in clear distance vision. The effect lasts for about a day, after which the cornea gradually returns to its original shape.
This is why the method is called reversible. Nothing is removed or cut. If you stop using the overnight correction, the cornea returns to its original shape within a few days. For parents of children, this is often the deciding factor when choosing lenses.
How does orthokeratology differ from regular contact lenses?
Regular contact lenses are worn during the day, and they only correct vision while they're in place. Here, it's the opposite: orthokeratology lenses work at night, leaving the eye free to use during the day. This is convenient for those who find daytime vision correction at work or in sports disruptive and who don't want to depend on glasses.
There's also a difference in the material: rigid, gas-permeable lenses are used for overnight wear, allowing oxygen to reach the cornea. This allows the eye to breathe even while sleeping. Selecting and calculating these lenses is more complex than with regular daily vision correction and requires the experience of a doctor.