What is the difference between nearsighted and farsighted lenses?

Nearsighted (myopia) lenses use negative SPH values to correct distance vision. Farsighted (hyperopia) lenses use positive SPH values to help with close-up vision.

How do I find the sphere (SPH) value on my prescription?

Look for SPH or Sphere. It can also be labelled Power or PWR. A minus sign (-) is nearsighted and a plus sign (+) is farsighted.

How should I adjust my prescription for clear vision underwater?

For most people, choose 0.50 diopters weaker (towards zero) than your normal SPH, then select the closest available 0.50 step. This helps because water creates natural magnification and mask lenses sit further from your eyes than glasses.

I have astigmatism (CYL). What should I choose?

Our standard options are based on SPH. If CYL is 1.00 or less, you can usually follow the 0.50 underwater adjustment from SPH and pick the closest 0.50 step. If CYL is stronger than 1.00, choose no reduction or a minimal 0.25 reduction (if available), then pick the closest 0.50 step. Upload your prescription if you want us to confirm the best match.

I can’t find my lens strength in the dropdown. What should I do?

The dropdown shows all available strengths for that mask. If your exact number is not listed, choose the closest available option using the guidance above. Upload your prescription or email info@oceansoptics.com if you want us to confirm the best match.

Can I choose different lens strengths for each eye?

Yes. You can select different strengths for left and right eye and mix and match any combination available in the dropdown.

How do I upload my prescription during checkout?

On the product page you can optionally upload your prescription so we can check your selection before we build it. You can also leave a note in the cart or email info@oceansoptics.com.

How do I stop my mask from fogging?

Try the toothpaste trick: rub a small amount of toothpaste on the inside of each lens in circular motions for a few minutes, then rinse thoroughly. Repeat if needed. Before each session, you can also use a tiny amount of baby shampoo or dish soap mixed with water, rub a thin film on the lens, then lightly rinse.

Do you have a guide to help me use my mask properly?

Yes. Mask 101 guide: https://cdn.shopify.com/s/files/1/0798/8055/2781/files/Mask_101.pdf?v=1728895468

What happens if I accidentally choose the wrong lens strength?

Message us as soon as possible. If the order has not entered the build or shipping stage yet, we can usually update the lens selection.

Are your lenses safe for both snorkeling and scuba diving?

Yes. Lenses are HD tempered glass and suitable for snorkeling and scuba diving up to 100 ft (30 m).

How long does delivery take, and can I track my order?

Most orders arrive in 5 to 10 days, but allow up to 14 days to be safe. Tracking is provided by email once shipped.

What is your return or exchange policy for prescription masks?

You have 30 days from delivery to request a return, as long as the item is unworn, unused, with tags, and in original packaging. See the return policy on the Oceans Optics website for full details.

Returns & Warranty

Masks and Gear Returns, Warranty and Cancellations Policy

(Merch policy below)

At Oceans Optics, your happiness means the world to us. We are all about making your underwater adventures amazing, and we are here to help if something is not quite right.

1. 30 Day Return Window (from Delivery)

You have 30 days from the day your order arrives to request a return or exchange. To qualify, your item must be unused, in its original packaging, and in the same condition you received it.

Your return should be fully completed within this 30 day window. If there is a delay caused by us, or you have reached out within that timeframe and are waiting on our reply, you will still be covered. However, if we do not hear back after your initial request and the 30 days pass, the return will no longer be eligible.

2. Defective or Incorrect Items

If you receive a defective or incorrect item, email us as soon as possible at info@oceanoptics.com. We will make it right by arranging a replacement or refund.

3. Change of Mind Returns

Changed your mind. No worries, we have got you covered.

That said, we care deeply about reducing waste and promoting sustainability, so we always encourage you to choose carefully and reach out for professional guidance before ordering if you are unsure.

Return Shipping
Customers are responsible for return shipping costs on change of mind returns. We do not charge restocking fees.

Delivery Timing
If your item arrived within the estimated delivery window, even if it was not as early as you hoped, return shipping costs will still be your responsibility.

Holiday and Trip Timing
Returns are not eligible if your mask arrived within our expected delivery timeframe (up to 14 days plus or minus 5 days) but did not reach you before your trip. We strongly recommend ordering well ahead of travel dates to ensure your mask arrives in time.

4. Order Cancellations

We begin preparing many orders quickly, especially prescription masks, so we ask that cancellations are requested as soon as possible.

Cancellation Window
Orders may be cancelled within 6 hours of purchase by contacting us at info@oceanoptics.com.

Cancellation Fee
A $10 cancellation and processing fee applies to all cancelled orders. This covers non refundable payment processing fees and the time spent reviewing, checking, and preparing your order.

Orders Already in Processing
Once prescription lenses are in production or mask assembly has begun, orders can no longer be cancelled or changed.

Important Timing Note
We are not a same day or express service. Orders cannot be cancelled due to personal travel timing if they fall within our stated delivery estimates. If you have a tight deadline, please contact us before ordering so we can confirm what is realistic.

5. Sizing and Prescription Accuracy

We want you to love your mask and lenses from the very first dive. Because every lens is made to order, it is important that your prescription comes directly from a qualified optometrist and is not an estimate or guess.

If your return is due to the lenses not providing clear vision, we may ask for a copy of your prescription to confirm the order was placed correctly. If you are unable to provide it, your return may not be eligible.

For reasons related to sizing or prescription accuracy, refunds are issued as store credit so you can get the right mask.

Pro Guidance Exception
If you contacted our team with your prescription and measurements before ordering and we confirmed the mask would be a good match, your order will be eligible for a full refund or exchange if it does not work out.

6. 6 Month Limited Warranty

All Oceans Optics masks come with a 6 month warranty covering manufacturing defects.

If you notice an issue, email info@oceanoptics.com with photos and details and we will help you get it sorted.

Covered
Manufacturing defects such as cracks or seal issues not caused by wear.

A Quick Note on Buckles
Our buckles are designed for comfort and easy adjustment and should always be handled gently. If a buckle breaks due to a manufacturing defect, it is fully covered under warranty. Damage caused by pulling, twisting, or over tightening is not considered a defect. Replacement parts are available at cost price.

7. Prescription Lens Appearance

Prescription lenses are naturally tapered along the edges. This is completely standard across all prescription masks. The stronger the prescription, the more noticeable this taper may be.

Please refer to the lens diagram on each product page before ordering.

Masks are not eligible for return based on lens appearance or slight differences in viewing area compared to standard tempered glass masks.

8. Non Returnable Items

The following items are not eligible for return:

Custom masks with different lens strengths in each eye
Snorkels and mask cases
Gift cards and digital downloads
Items marked as final sale or clearance

9. How to Initiate a Return or Exchange

Start a return using the “Start a Return” page found in the main menu, or email info@oceanoptics.com with your order number and details.

We will send clear step by step instructions. Items must be securely packed in original packaging with all accessories included. Trackable shipping is required.

If the return is due to our error or a defect, we will provide a prepaid return label.

10. Refunds and Processing

Once your return is received, we will inspect it and notify you of approval.

Approved refunds are issued to the original payment method within 5 to 7 business days.

Exchanges are shipped as soon as the return is processed.

11. Exceptions and Exclusions

Items returned in used, damaged, or incomplete condition may qualify for a partial refund or no refund.

Sale items, discounted items, gift cards, and items bought with discount codes are final sale.

Returns requested after 30 days are not accepted.

Any free gifts must also be returned to receive a full refund.

12. International Returns

For orders outside the United States, return shipping costs, duties, and taxes are the responsibility of the customer unless the item is defective or sent in error.

13. Our Commitment

We are here to make your Oceans Optics experience amazing from start to finish. If you have questions about returns, cancellations, or warranties, email us at info@oceanoptics.com and we will help.

Environmental Note
Please avoid ordering multiple masks with the intention of returning them. Use our guides and expert advice to choose correctly the first time.

We are a small, dedicated team of snorkel enthusiasts who personally handle every order. Fair policies allow us to keep delivering quality, service, and personal care while protecting the ocean we all love.

Thank you for supporting our mission.

I Can Sea Merch Return Policy

Oceans Optics Merch Returns and Replacement Policy

We offer replacements or refunds if your merch arrives with a manufacturing defect, printing error, or production damage. Contact us within 20 days of delivery with clear photos. No return is required.

Not Eligible for Return
Wrong size ordered
Wrong color ordered
Change of mind or preference

Please check size guides carefully before ordering.

Unsuccessful Deliveries
Orders returned due to incorrect addresses or missed delivery attempts are generally not refundable. Replacement and reshipping costs may apply.

Small Variations
Print placement differences up to 0.5 inches are considered normal and not a defect.