Ortho-K vs Glasses
A comprehensive comparison to help Australian parents make the best choice for their child's vision and lifestyle
When your child is diagnosed with myopia, one of the first questions every parent asks is: "Will they need glasses?" While glasses are the traditional approach, Ortho-K (orthokeratology) offers an alternative that may be better suited to some children—especially those with progressive myopia. Here's how they compare.
Side-by-Side Comparison
| Feature | Ortho-K Lenses | Traditional Glasses |
|---|---|---|
| Daytime vision correction | ✓ Crystal clear all day | ✓ Clear while wearing |
| Wear schedule | Overnight while sleeping | All waking hours |
| No eyewear during day | ✓ Yes—complete freedom | ✗ Must wear glasses to see |
| Myopia control | ✓ 40-60% reduction in progression | ✗ No effect on progression |
| Suitable from age | 8 years and above | Any age |
| Sports & swimming | ✓ Perfect—nothing to lose or break | ⚠️ Problematic—glasses can break or fall |
| Surgery required | ✗ None—completely reversible | ✗ None |
| Risk of loss/damage | Low—worn safely at home | High—daily handling, school, sports |
| Self-confidence | ✓ No glasses visible | ⚠️ Some children self-conscious |
| Initial cost | $1,500-$2,500 (or subscription) | $200-$600 |
| Ongoing cost (annual) | $1,800-$2,400 (includes everything) | $300-$800 (replacements, repairs) |
| Medicare rebate available | ✓ Yes for consultations | Limited (frames only) |
| Private health insurance | ✓ Often covered under extras | ✓ Usually covered |
| Reversible if you stop | ✓ Yes—vision returns to original | N/A |
Vision Correction: How Each Works
How Ortho-K Works
Ortho-K lenses are worn overnight while your child sleeps. The lenses gently and temporarily reshape the cornea—the clear front surface of the eye. By morning, the cornea has been reshaped to focus light correctly, and your child can see clearly all day long without any eyewear.
The effect is temporary. If your child stops wearing the lenses, their cornea gradually returns to its original shape over 1-2 weeks. This is why nightly wear is important to maintain clear daytime vision.
Unlike glasses, which simply compensate for the focusing error, Ortho-K actually changes the way light enters the eye. Clinical studies have shown this approach also slows myopia progression—something glasses cannot do.
How Glasses Work
Traditional glasses use lenses to redirect light before it enters the eye, compensating for the cornea's excessive curvature. The lenses bend light rays to focus them properly on the retina at the back of the eye.
Glasses provide clear vision only while they're being worn. If your child takes them off, they can't see clearly. This means glasses must be worn throughout all waking hours to function normally.
Crucially, glasses do not address the underlying cause of myopia or slow its progression. Each year, the prescription often increases, requiring stronger glasses.
Myopia Control: Why This Matters
This is where Ortho-K has a decisive advantage. Myopia control—slowing or stopping the progression of short-sightedness—is one of the most important considerations for parents of children with myopia.
The Myopia Progression Problem
Myopia typically develops in childhood and progresses until the eye fully matures—usually around 18 years of age. Each year of progression adds to the final prescription level. High myopia (above -6.00 diopters) carries significantly increased lifetime risk of serious eye conditions including retinal detachment, glaucoma, and myopic maculopathy.
Research shows that for every 1 diopter reduction in final myopia level, the risk of myopic maculopathy decreases by 40%. This is why myopia control is so important.
Ortho-K & Myopia Control
40-60% reduction in myopia progression. Multiple clinical studies have demonstrated that Ortho-K lenses significantly slow the rate at which childhood myopia worsens. The effect is thought to work by creating peripheral defocus—meaning the lens reshapes the cornea in a way that reduces the eye's growth signal.
This means your child's prescription may stabilize at a much lower level than it would with glasses alone. Some children experience very little progression over several years of Ortho-K treatment.
Ortho-K is one of the most effective myopia control methods available, along with specialized soft lenses (like MiSight) and low-dose atropine eye drops.
Glasses & Myopia Control
No myopia control effect. Standard single-vision glasses correct distance vision but do not reduce the stimulus for eye growth. In fact, some research suggests single-vision glasses may not be optimal for myopia control because they provide the same focusing correction across the entire lens, including the peripheral zones.
There are specialized "myopia control glasses" with modified lens designs (like executive bifocals or DIMS lenses) that show some myopia control effect in clinical trials. However, they are not widely available in Australia and their efficacy is lower than Ortho-K or specialized contacts.
If your child has progressive myopia, glasses alone will not address the underlying progression.
Lifestyle & Practical Considerations
🏊 Swimming & Water Sports
⚽ Team Sports
🏃 Active Play
📱 Screen Time & Reading
🏫 School Life
😴 Sleepovers & Camps
Cost Comparison Over Time
Understanding the true cost of each option requires looking at both upfront expenses and ongoing costs over several years.
Ortho-K Total Cost (5 Years)
- Year 1: $2,500-$3,500 (consultation, lenses, fitting)
- Years 2-5: $1,800-$2,400/year (subscription, replacements)
- Medicare rebates: Can reduce Year 1 by $200-$400
- Health insurance: May cover $300-$500/year under extras
Includes: lenses, progress checks, replacements, support, AND myopia control worth $3,000-$5,000 in avoided future treatments
Glasses Total Cost (5 Years)
- Pairs purchased: 3-6 pairs (breakage, style changes, prescription changes)
- Each pair: $200-$600 (frames + lenses)
- Replacement: Average 1 pair per year minimum
- Prescription changes: May need new glasses each year as myopia progresses
Does NOT include myopia control. Myopia will likely progress requiring stronger glasses each year.
The Hidden Cost of Glasses
With glasses alone, myopia typically progresses 0.50-1.00 diopters per year in growing children. After 5 years, a child who started at -2.00 may be at -4.00 to -6.00. Each diopter of progression increases lifetime eye disease risk. The "savings" from choosing glasses may cost your child's vision in the long run.
Which Should You Choose?
Choose Ortho-K if...
- Your child's myopia is progressing (even 0.25D/year matters)
- You have a family history of high myopia
- Your child is active in sports or swimming
- Your child is self-conscious about glasses
- Your child finds glasses inconvenient or keeps forgetting them
- You want to protect your child's long-term eye health
- Your child is 8 years or older and responsible enough for lens care
Glasses May Be Fine if...
- Your child's myopia is stable (no progression for 1+ year)
- Your child is very young (under 8) and not a candidate yet
- Budget is severely constrained and myopia is mild
- Your child is extremely resistant to contact lens handling
- Your child has certain eye conditions that contraindicate Ortho-K
Even in these cases, discuss myopia control options with your optometrist.
Common Questions
Can my child switch from glasses to Ortho-K?
Yes! Most children who wear glasses are excellent candidates for Ortho-K. During the transition period, your child may need to wear their glasses occasionally until the Ortho-K effect is fully established (usually 2-4 weeks).
What if my child can't handle contact lenses?
Ortho-K requires your child to be able to insert, remove, and care for lenses. Most children over 8 can learn this with proper training. Our optometrists spend time during fitting to ensure your child is comfortable with the routine. Some children who initially struggle with daytime contacts adapt very well to Ortho-K because the lenses are worn during sleep when there's no time pressure.
Is Ortho-K painful?
Most children don't find Ortho-K lenses uncomfortable. There may be mild awareness when first inserting them, and some children notice them for the first few nights. After the adaptation period (usually 1-2 weeks), most children sleep comfortably through the night with no awareness of the lenses.
How do I know if my child needs myopia control?
Any child with progressive myopia should be considered for myopia control. "Progressive" means the prescription has increased by 0.25 diopters or more in the past year. Even slow progression adds up over childhood. Your optometrist can measure axial length (eye length) to determine progression risk. Book a consultation to get a comprehensive assessment.