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We have in stock, every diopter from +1.0 to +4.0 in 0.5 diopter increments for divers who want to be able to clearly read their gauges. Please do not mistake these pre-cut lens as add-on lens. They are pre-ground and inserted into your mask in place of the standard flat lens.
Please note that these lens are for those divers who only require lens for reading their gauges (similar to reading glasses). The top portion of the pre-cut bifocal lens is plain glass and the bottom half can have a diopter anywhere from +1.00 to +4.00 in 0.5 diopter increments.
Beyond that, we also offer lenses for divers who are near-sighted and require negative diopter full lens ranging from -1.0 to -8.5 in 0.5 diopter increments. For negative lens with a full pre-cut lens from top to bottom, please inquire about these particular lens or see them in our other listings.
To determine the proper prescription lens needed, simply start by looking at the second number (cylindrical) of your prescription and see if it is equal to or greater than "1.0" (+ or -). If it is greater, then cut that figure in half and algebraically add it to the first number (spherical). If the cylindrical is less than "1.0" (+ or -), you can ignore it.
Since the final figure may fall somewhere in between the pre-ground lens, simply round off to the nearest diopter.
If all of this sounds too complicated...don't worry, just call us at 818-913-3359 or email to firstname.lastname@example.org. Upon request, we will contact you via telephone to verify your prescription prior to lens installation and to answer any questions you may have.
Theses lenses are compatible with:
*ScubaPro Solara Mask
*Tusa Liberator Plus (TM-5700)
*Sherwood MA22 Vantage and MA20 Magnum 2 Mask
*Genesis SL SM4700 Mask
*XS Scuba MA600 Metro Mask
*XS Scuba Z Duo Mask
*Promate Scope MK245 Mask
*Promate Scanner MK250 Mask
*Promate Super Scanner MK450 Mask
*Promate Pro Scanner MK650 Mask
*Deep See Focus Mask
*Tilos Universal, Universal II Masks
*ScubaMax MK121 Navigator Mask
These were replacements for old custom prescription lenses. With my vision quite improved after cataract surgery, all I needed were bifocal readers. My only complaint is that there is no allowance for varying distances between pupils. This means you can really only use one bifocal at a time if you have a narrower face. No worries, as this is intended for gauge reading. Just be aware.
I lost my previous mask with readers installed, and sobought these for my ScubaPro Solara mask and installed them myself. Super fast delivery, easy to install, mask is waterproof and I can read my gauges again! Make sure you get the right fit for your mask and the right prescription as it changes quite drastically every .5 increment. I will be buying another set shortly in order to have a back up for my upcoming trip to Galapagos!