Prescription Mask
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Marek K
Contributor
I've got extremely high negative correction (nearsightedness) -- about minus 10 diopters :shocked2:. With quite high astigmatism, and now significant presbyopia (reading correction).
I've never understood the argument that the water magnification phenomenon somehow means that you need less refractive correction. Larger and fuzzy is still...well...fuzzy.
I am extremely demanding regarding my vision (distance, astigmatism, and reading) for my normal glasses in air.
What's certain, though, is that optics underwater are quite different than in air. And I do agree that distance correction is much, much less critical underwater.
I dive with off-the-shelf spherical-correction lenses, and see perfectly underwater. To include reading my gauges. I tend to go to the exact or next-weaker available correction. Of course, my correction has long since stopped getting worse.
For what it's worth, my optometrist tells me that a difference of plus or minus .25 diopters is within the normal error variation when lenses are ground.
I've never understood the argument that the water magnification phenomenon somehow means that you need less refractive correction. Larger and fuzzy is still...well...fuzzy.
I am extremely demanding regarding my vision (distance, astigmatism, and reading) for my normal glasses in air.
What's certain, though, is that optics underwater are quite different than in air. And I do agree that distance correction is much, much less critical underwater.
I dive with off-the-shelf spherical-correction lenses, and see perfectly underwater. To include reading my gauges. I tend to go to the exact or next-weaker available correction. Of course, my correction has long since stopped getting worse.
For what it's worth, my optometrist tells me that a difference of plus or minus .25 diopters is within the normal error variation when lenses are ground.
Plenty of places do off the shelf prescription lenses for masks including Mares but if you want your exact prescription you have to go to a specialist.
The specialist also needs to be an eye doctor/optometrist/optician (depending on what country you come from).
Dive-Vision.com offer an excellent service and the technical director is a specialist sports qualified eyedoctor/optician.
The specialist also needs to be an eye doctor/optometrist/optician (depending on what country you come from).
Dive-Vision.com offer an excellent service and the technical director is a specialist sports qualified eyedoctor/optician.
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