What is the difference between nearsighted and farsighted lenses?

Nearsighted lenses have a negative SPH value and correct distance vision. Farsighted lenses have a positive SPH value and correct close-up vision.

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

The SPH value is usually in the first column of your prescription. A negative number indicates nearsightedness, while a positive number indicates farsightedness.

How Should I Adjust My Prescription for Clear Vision Underwater?

Select a lens strength 0.50 to 0.75 diopters weaker than your regular prescription to compensate for underwater magnification.

Can I choose a lens strength that isn’t listed in the dropdown?

If your exact strength isn’t available, pick a lens 0.50 to 0.75 diopters weaker than your prescription to maintain clear vision underwater.

Can I choose different lens strengths for each eye?

Yes, you can select different strengths for each eye if they are available in the dropdown.

How do I upload my prescription during checkout?

You don't need to upload it. Contact us via chat or email if you require specific strengths or assistance.

What happens if I accidentally choose the wrong lens strength?

Contact customer support immediately. We may be able to correct the order depending on its processing stage.

Are your lenses safe for both snorkeling and scuba diving?

Yes, all lenses are certified HD Tempered glass and safe for snorkeling and scuba diving up to 100ft.

How long does it take to receive lenses, and can I track my order?

Orders usually take 7-14 days to process. A tracking number will be provided via email upon shipment.

What is your return or exchange policy for prescription lenses?

You have 30 days from delivery to return your mask. For full details, visit our returns policy on the Oceans Optics website.

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XVIZ SMB 4FT Scuba Diving Surface Marker Buoy with Valve

Name: XVIZ SMB 4FT Scuba Diving Surface Marker Buoy with Valve
Brand: Oceans Optics
SKU: 32993447568-Orange
Price: 60.0 USD
Availability: InStock

XVIZ SMB 4FT Scuba Diving Surface Marker Buoy with Valve

Quantity

$60.00 USD

~~$70.00 USD~~ $60.00 USD

SALE Sold out

Product Description

Surface Marker Buoys (SMBs) are essential for diving safety, and SignalForce SMB is a game-changer for every diver, regardless of experience. At 1.2m (4 feet) in length, this high-visibility buoy provides the security you need in unexpected conditions. Whether navigating strong currents or surfacing in busy boat areas, the Ultimate Pro SMB ensures you’re a clear, unmissable beacon on the surface.

Crafted for durability and ease of use, this SMB is built with high-grade materials and features designed for both safety and convenience.

Fun Fact

Red or Orange SMB: Typically indicates a routine ascent, meaning the diver is surfacing as planned and doesn’t require immediate assistance. It’s the standard color for SMBs used in recreational diving as well.

Yellow SMB: Often used to signal an emergency or request assistance. In technical diving, a yellow SMB means that the diver may need help, such as an issue with gas supply or other complications, and they may require immediate attention from the surface support.