First, I removed two optical lenses from my old eyeglass.
Step 1: A Cord of Sugru
Using sugru, I made a small adhesive cord that has a length which is equal to twice the diameter of each lens.
Step 2: Hint !
Both lenses fit inside the underwater goggles as you can see from the previous images :)
Step 3: Entourage
Surround the lens with sugru and apply pressure to fix it inside the goggles.
Step 4: Optical Goggles Ready for Use !
.. and do your best to remove the additional sugru outside the frame . Finally, I have optical underwater swimming goggles :D
This was done as part of the Instructables, July 2013 Build Night with SUGRU - LambaLabs Hackerspace event, Beirut !