Patent ID: 8185973

Claim:
A series of underwater vision articles, comprising several articles of different sizes, said articles including a right optical element itself including a right sealing element intended to come into contact via its right contact area with the face of a person, and a left optical element itself including a left sealing element intended to come into contact via its left contact area with the face of a person, wherein when said right and left article elements are placed down flat on a same supporting plane on their side opposite to the side of said right and left contact areas of said right and left sealing elements the following points are present: P 1 being the lowest point of the inner or outer edge of said left contact area, P 2 being the leftmost point of the inner or outer edge of said left contact area, P 3 being the lowest point of the inner or outer edge of said right contact area, P 4 being the rightmost point of the inner or outer edge of the right contact area, wherein regardless the size of said articles in the series, at least one of the ratio between PP 2,4 and PP 1,3 is constant to within 5%, and the ratio between PP 2,4 plus a constant predefined to within 5%, and PP 1,2 is constant to within 5%, wherein PP i,j is the distance between P i and P j , for any i and j.