Laminated glass comprising a fixation device introduced in a porthole for objects

A laminated glass sheet comprising:

• a first rigid sheet and a second rigid sheet, the first and second sheets including glass or plastic;
• a layer of adhesive disposed between the first and second sheets so as to bond together a first surface of the first sheet to a first surface of the second sheet;
• a through-hole including a first hole in the first sheet and a second hole in the second sheet, the first hole being smaller in size than the second hole;
• a fixing device inserted into the through-hole for fixing objects to the laminated glass sheet, the fixing device including a plate and a washer, the plate and the washer disposed so as to press against opposite surfaces of the first sheet around an edge of the first hole,
• wherein a region of walls of the first hole exhibits an edge compression stress that is increased by heat treatment by comparison with a remainder of the first sheet, and
• wherein the layer of adhesive is a film in a region of the through-hole, an inner diameter of the layer of adhesive being larger than a diameter of the second hole, and
• wherein the layer of adhesive does not protrude beyond the diameter of the second hole.