Disclosed is a diving mask (1), wherein the mask body (2) shows, in cross section, a substantially truncated-conic shape with diverging walls starting from the glass (3) area towards the face-supporting edge and without undercuts. This allows, to considerably approach the lenses (3) to the face so as to guarantee a wide visual angle. Moreover the inner air volume is decreased with consequent less problems caused by the water pressure, when diving at a certain depth.
The walls show preferably two pieces having a different thickness, with a first piece near the glasses (3), having a greater and substantially uniform thickness which supports the face and which connects to a second piece, which is thinner and has a thickness decreasing up to the extreme edge, to guarantee watertightness, without the need to resort to edges, tongues or complex embodiments which would involve the need to resort to complex moulds.
This purpose is reached by a diving mask (1), wherein the flat glasses (3) are positioned sloping with the outer edges placed backwards.
By choosing in an appropriate way the glass (3) angular position it is possible to obtain a view wherein the objects appear with the real sizes and therefore to have a correct perception of their distance.