New Bi-focal Gauge Reader Prescription Lens for the Universal Navigator Scuba Diving & Snorkeling Mask (+4.0 Diopter Left)
- Tempered bi-symmetrical glass lens for divers who want a mask with reading glasses for underwater in order to clearly see their gauges
- This lens fits on the left side of our "Universal Navigator" Mask
- Prescription Lens are professionally installed and pressure tested for FREE when you purchase lens on the same order
- Please note that lenses are sold by the individual lens and you will need to order two lenses to make a set
- These lens fit the following masks....
TUSA "Liberator Plus"
TUSA "Splendive II"
TUSA "Splendive IV"
Tilos "Universal II"
Sherwood "Magnum 2"
XS Scuba "Metro"
XS Scuba "Z Duo"
Promate "Super Scanner"
Promate "Pro Scanner"
Deep See "Focus"
And Many Others....
We have in stock, every diopter from +1.0 to +4.0 in 1/2 diopter increments for divers who want to be able to clearly read their gauges. When you purchase the "Universal Navigator" mask along with the 2 prescription lens from us, you will receive the mask with 2 pre-cut lens professionally installed and pressure tested for leaks. 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 +1.0 to +4.0 in 1/2 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 -8.0 in 1/2 diopter increments. We also offer lenses for divers who are far-sighted and require positive diopter full lens ranging from +1.0 to a +3.0 in 1/2 diopter increments. For both positive or 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. Upon request, we will contact you via telephone to verify your prescription prior to lens installation and to answer any questions you may have.