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Rx Lens Strength + Face Fit
Find Your Prescription Mask Quiz
Built specifically for prescription snorkel and dive masks, this quiz helps match your lens strength, face fit, and intended use in one simple flow.
Answer up to 6 quick questions in about 2 minutes.
Start the quiz →Have your prescription nearby if you know your numbers. If not, no problem, we can still guide you.
Your prescription image is only used to read your values. It is never stored.
Frequently Asked Questions
Nearsighted (Myopia) Lenses: These lenses have a negative sphere (SPH) value and correct distance vision. Farsighted (Hyperopia) Lenses: These lenses have a positive SPH value and correct close-up vision.
The SPH value is usually in the first column of your prescription, marked as "SPH" or "Sphere." A negative number indicates nearsightedness, while a positive number indicates farsightedness.
Prescription Adjustment for Underwater Clarity: To achieve clear and accurate vision underwater, we recommend selecting a lens strength that is 0.50 to 0.75 diopters weaker than your regular prescription. This adjustment helps to compensate for the magnification effect that occurs underwater, reducing the risk of distortion.
Example: Your Regular Prescription: Right Eye (OD): Sphere = -2.75; Left Eye (OS): Sphere = -3.50. Recommended Lens Strength: Right Eye (OD): Sphere = -2.00; Left Eye (OS): Sphere = -3.00.
The lenses listed are the only ones available for the specific mask in the listing. If your exact strength isn’t available, select a lens that stays within the recommended adjustment range of 0.50 to 0.75 diopters weaker than your regular prescription. This ensures you maintain clear and accurate vision underwater within a safe and effective range.
Yes, you can select different lens strengths for each eye based on your individual prescription. We offer a range of lens strengths, and you can mix and match any combination available in our dropdown menus to match your prescription needs. However, please note that we only offer the specific variations listed for each mask. If your exact prescription isn’t listed, select the closest available option.
You don’t need to upload your prescription. If you require specific lens strengths or have questions about your order, please send us a message through the online chat or email us at info@oceansoptics.com. We’re happy to help ensure you get the correct lenses for your needs.
Contact customer support immediately if you choose the wrong strength. We may be able to correct the order, depending on the processing stage.
Yes, all our lenses are made from HD Tempered glass, safe for both snorkeling and scuba diving.
Orders typically take 7-14 days to process. You will receive a tracking number via email once shipped.
Since prescription lenses are selected based on your input, they are generally non-returnable and non-exchangeable. For more details, refer to our full policy on Oceans Optics.