FreeFloat
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Was up at Dive Tech the other day and ended up discussing the masks at some length. I guess when worn by "normal-sighted" people they seem to have about a -4 diopter refraction - hence the 'clip-on/flip-down' lenses as modelled by Doppler above.
Hm, normally I'm -5.5/-4.75 - guess I could almost use them without any corrective contacts!
Personally, I wouldn't be caught dead in them - plus they're not exactly low volume from teh looks of things.
Hm, normally I'm -5.5/-4.75 - guess I could almost use them without any corrective contacts!
Personally, I wouldn't be caught dead in them - plus they're not exactly low volume from teh looks of things.