Prescription Swimming Goggles: How to Choose the Right Lens Strength
Last updated: October 2026 · By the Aqua Style team
Prescription swimming goggles have corrective lenses built in, so short-sighted or long-sighted swimmers can see clearly underwater without contact lenses. The simplest option is a modular goggle where you choose a separate lens strength for each eye and assemble it yourself.
How modular prescription goggles work
The Mad Wave Streamline prescription goggle uses an independent lens for each eye, available from -9 for short-sightedness to +2.5 for long-sightedness. You pick the two lenses you need, add the strap and nose-bridge kit, and fit them together. A complete goggle (two lenses plus the fitting kit) starts from SAR 140.
Choosing your lens strength
- Take the sphere (SPH) value for each eye from your latest eye test or glasses prescription.
- Choose the lens closest to that value for each eye. Lenses come in fixed steps, so you may need to round.
- If your prescription includes astigmatism (CYL), standard swim lenses do not correct it. Ask your optician for your spherical equivalent, which is a good starting point for swim lenses.
- If your two eyes differ, use a different lens on each side; that is the main advantage of a modular goggle.
| Your situation | What to choose |
|---|---|
| Short-sighted (minus prescription) | Minus lenses, for example -3.0 |
| Long-sighted (plus prescription) | Plus lenses up to +2.5 |
| Different strength per eye | A different lens on each side |
| Astigmatism | Spherical equivalent, after asking your optician |
Why not just wear contact lenses?
Eye-care professionals generally advise against swimming in contact lenses because pool and sea water can carry germs that cause eye infections. Prescription goggles remove that risk and are simple for children and adults.
Frequently asked questions
Can children use prescription swimming goggles?
Yes, as long as the goggle fits their face comfortably. Check the frame size, and confirm the lens strength with the child's optician.
Do I need a doctor's prescription to order?
You only need to know the strength of each eye. Use a recent eye test result; if in doubt, ask your optician before ordering.
Can I change the lenses later?
With a modular goggle you can replace a single lens if your vision changes, instead of buying a whole new goggle.
Build yours on our prescription goggles page, or browse all goggles. Please note this guide is general information and not medical advice.
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