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Scuba diver with bifocal lenses in half mask. Diving masks can be fitted with prescription lenses for divers needing optical correction to improve vision. [19] Corrective lenses are ground flat on one side and optically cemented to the inside face of the mask lens. This provides the same amount of correction above and below the surface of the ...
Diving masks can be fitted with lenses for divers needing optical correction to improve vision. Corrective lenses are ground flat on one side and optically cemented to the inside face of the mask lens. This provides the same amount of correction above and below the surface of the water as the curved surface of the lens is in contact with air in ...
Regular spectacles can be worn in most helmets, but cannot be adjusted during the dive. Corrective lenses can be glued to the inside of half-masks and some full-face masks, but the distance from the eyes to the lenses may not be optimal, and some correction may be needed to compensate for the increased distance from the cornea to the lens.
Divers who need corrective lenses to see clearly outside the water would normally need the same prescription while wearing a mask. Generic corrective lenses are available off the shelf for some two-window masks, and custom lenses can be bonded onto masks that have a single front window or two windows. [60]
A diving mask (also half mask, dive mask or scuba mask) is an item of diving equipment that allows underwater divers, including scuba divers, free-divers, and snorkelers, to see clearly underwater. Surface supplied divers usually use a full face mask or diving helmet , but in some systems the half mask may be used.
A prescription mask contains lenses mounted in the scuba mask frame or bonded to the original viewports. Diving helmets are often used for surface-supplied diving . They provide the same benefits as the full face mask but provide a very secure connection of the gas supply to the diver and additionally protect the head.
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