Objects appear 33% larger underwater

When light enters the water, it bends (refracts) differently than it does in the air. This refraction, combined with the magnification effect of water, causes objects to appear larger and closer than they are. This can significantly distort vision for both nearsighted and farsighted individuals.

Be sure

Our lens calculator tool adjusts your prescription for underwater magnification, typically weakening it by 0.25-0.75 diopters.

Manual calculations can lead to errors, so our tool ensures accurate corrections for a clear and safe underwater experience.

Choose Vision
Underwater Lens Calculator

Enter your prescription into our lens calculator and we will do the work for you.

Suggested Lens Strength:

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Right

  • Step 1:

    Calculate your underwater prescription.

  • Step 2:

    Shop our masks & choose your style!

    Shop our Masks 

  • Step 3:

    Select your Lens Strength .

  • Step 4:

    Place your order, sit back and wait for the products.

    Check your e-mail for Ocean Wise, your free digital e-guide which is included FREE with every purchase.

Choose your style:

All our lenses are made form HD Tempered glass. Safe for Snorkeling, Freediving & Scuba diving

FAQ

  • What are your prescription masks correcting for?

    Our prescription masks are designed to correct either nearsightedness (myopia) or farsightedness (hyperopia), enhancing your underwater vision. To achieve optimal clarity, we offer a lens calculator tool that adjusts for underwater magnification, typically weakening your prescription by 0.25 to 0.75 diopters.

  • What does the lens calculator adjust?

    The lens calculator makes a marginal adjustment to account for underwater magnification. If you have had a recent eye test (within the last two years), the lens calculator adjustment should work well for you. However, individual results may vary based on specific vision needs and environmental factors.

  • Important Considerations:

    If your eye test was conducted over two years ago, we strongly recommend getting a new test to ensure the accuracy of your prescription. Please note that we do not cover warranty claims based on outdated prescriptions.

    Our lenses are primarily designed to correct simple myopia (nearsightedness) and hyperopia (farsightedness). They may provide some assistance with very mild astigmatism (irregular curvature of the cornea), but we cannot guarantee full correction for astigmatism or other more complex refractive errors.

  • Limitations of Our Prescription Lenses:

    Sphere (SPH or Power): Our lenses correct the sphere component of your prescription, addressing myopia (nearsightedness) and hyperopia (farsightedness).

    Cylinder (Cyl): Our lenses are not designed to correct significant astigmatism, which requires a specific cylindrical correction.

    Axis: The orientation of astigmatism correction (axis) is not accounted for in our lenses.

    Add: Our lenses do not address the additional magnification needed for reading or close-up vision (presbyopia).

    Prism: We do not correct for prism, which is needed for conditions like strabismus (eye alignment issues).

    Base: Base direction (used in prism correction) is also not addressed by our lenses.

  • What do I do if the lens isnt clear enough?

    If you experience any issues with your lenses, we are here to help. We will review each case individually to determine the best solution. To assist us, please provide your most recent eye test results and a description.