Ortho-K Lens Side Effects: What You Need to Know

Orthokeratology is an increasingly popular option for both adults and children who want to manage myopia or enjoy lens-free vision during the day.

As with any contact lens treatment, it’s important to understand the potential side effects so you can make an informed decision and care for your eyes properly.

In this article, we’ll explain common side effects, how to manage them, and what you can do to reduce the risk of complications.

What Are Ortho-K Lenses?

Orthokeratology (Ortho-K) uses customised rigid contact lenses to gently reshape the surface of your eye (the cornea) while you sleep. You remove them in the morning, and enjoy clear vision throughout the day. Think of them like dental braces for your eyes.

Common Ortho-K Lens Side Effects

Most Ortho-K lens side effects are mild and temporary, particularly during the first few weeks of wear. With proper fitting, follow-up, and hygiene, serious complications are rare. Here are some of the most commonly reported effects:

1. Mild Discomfort
It’s normal to feel the lenses when you first begin wearing them, especially in the first few nights. This usually settles as your eyes adapt.

Using lubricating drops before lens insertion can help with comfort.

2. Blurred or Fluctuating Vision
During the initial adjustment phase, your vision may vary throughout the day. This typically resolves within a week or two as your corneas stabilise.

3. Halos or Glare at Night
Some patients notice halos around lights, particularly at night. This can be more noticeable in low light and during the early stages of treatment.

4. Lens Binding
If the lens sticks to the eye upon waking, it may be due to dryness or poor insertion technique. This can usually be resolved with saline drops or gentle massage. Proper lens care helps prevent this.

5. Eye Dryness
Some people experience dryness due to changes in the tear film. Artificial tears or a moisture-rich lens solution may help.

6. Corneal Staining or Edema
Small marks or swelling may be observed on the surface of the eye. This is usually a sign the lens fit or oxygen flow needs adjusting. Regular monitoring helps prevent long-term issues.

7. White Lesions or Deposits
With long-term use, small white spots or deposits may appear. These are rare and often linked to hygiene or overwear. Regular check-ups ensure early detection and management.

8. Corneal Thinning
A small amount of corneal thinning can occur, typically in the early stages of treatment. Close monitoring and regular checkups can help ensure the integrity and health of the eye remains intact.

What About Infections?

The most serious potential risk with any contact lens, including Ortho-K, is microbial keratitis, an infection of the cornea.

Although rare, this condition can be serious. It’s usually linked to improper lens hygiene, overwear, or exposure to water while wearing lenses.

Signs include redness, pain, light sensitivity, or vision changes. If you notice any of these symptoms, seek immediate optometric care.

Ways to Reduce the Risk:

• Never rinse or store lenses in tap water.
• Avoid wearing lenses in the shower or while swimming.
• Always wash and dry your hands before touching your lenses.
• Use only recommended cleaning and storage solutions.
• Replace your lens case every 3 months.

With the right care, the risk of infection with Ortho-K is low and comparable to other overnight lens wear.

An accurate lens fit is also essential for comfort, safety and long-term success.

At Optometrist Parramatta, we use advanced corneal topography to customise Ortho-K lenses for your eyes. We then follow up regularly to check the fit, monitor corneal health, and make adjustments as needed.

This is particularly important for children, whose eyes are still growing and changing. 

When to See Your Optometrist

Ortho-K lenses should feel comfortable and provide clear vision throughout the day. You should book an appointment if you experience:

• Persistent discomfort
• Redness or irritation
• Sudden vision changes
• Light sensitivity
• Difficulty removing lenses

These symptoms may signal an issue that needs prompt attention.

In Summary

While generally safe when used properly, Ortho-K carries a slightly higher risk of serious eye infection compared to daily contact lenses due to overnight wear.

Always follow your optometrist’s instructions for proper hand hygiene, lens cleaning, disinfection, and storage.

Never wear the lenses if your eyes are red, painful, or irritated, and seek immediate professional care if you experience eye pain, redness, discharge, light sensitivity, or sudden vision changes.

If you’re interested in Ortho-K or have questions about side effects, we’re here to help.

Book a consultation at Optometrist Parramatta to find out whether Ortho-K is the right option for you.