Patent ID: 7404217

Claim:
Method for making a screen for eye protection goggles, wherein the screen mitigates fogging due to cold temperatures and optical distortion due to changes in altitude, the method comprising the steps of: connecting together a first and a second lens with a seal that extends along a closed ring-shaped path and is positioned along rims of the first and the second lenses to form an airtight cavity between the first and the second lens, the connecting step comprising the steps of: placing the seal onto one of the first and second lenses in a pasty state along the ring shaped path; and connecting the first lens to the second lens with the seal being placed between them when the seal is in the pasty state; reducing a pressure within the airtight cavity to a pressure lower than a pressure external to the airtight cavity; wherein the connection of the first lens, the second lens and the seal is carried out in an environment filled with dehumidified gas.