Does an RX have to be adjusted other than vertex when mounted in a scuba mask? I would think as long as there is air between the lens and the cornea the existing rx should work fine regardless of what the light passes through prior to the lens.
Does an RX have to be adjusted other than vertex when mounted in a scuba mask? I would think as long as there is air between the lens and the cornea the existing rx should work fine regardless of what the light passes through prior to the lens.
Mike
If you are using a plano front curve there is no need to adjust the Rx. If you are using anything other than a plano front then yes you need to adjust.
It depends on the kind of mask. An insert that fits completely inside the mask - with air on both surfaces of the lens - needs no compensation. For masks that expose the front surface to the water, lensgrinder stated it correctly.
So a plano base lense laminated to the inside of the mask would need compensation?
Mike
No, no compensation is needed in this case and you do not need to use a plano base in this case either.
www.hydrooptix.com
Interesting....
So if the front surface of the refracting lense is mounted to the inside of a diving mask and the outside of the diving mask is in water you are saying we need to compensate right? The masks Barry refered us to are pretty cool but for rx mounting they refer to flat lense masks.
Mike
Technically yes, but the problem with your scenario is that the front surface in most diving masks are flat or plano and are therefore not a refracting lense. The refraction occurs at the back surface, unless your mask has some curve to it then you would need to compensate as previously mentioned, because the surface would cause refraction.Originally Posted by Mike Fretto
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