Previous Concepts – How it works



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The parallel bar design of the frame and temples enables the lens to be moved to the correct inter pupillary distance prior to final fixing it also allows for side trims and other accessories to be fitted.

The lug provides a number of unique features, it is inserted through the frame the pad arm is then slipped over the shaft and set up to meet the correct nose size and shape.

The pad arm has a 16-point inner shaped star that slips over the square section of the lug this means that the position of the pad arm can be altered in 22.5` steps.

When someone has a small bridge nose and a wide inter pupillary distance the lugs can be fitted with the pad arm separately to the lens and hence fit any size nose.

The lug then passes through and the hole in the lens and cut to be flush with the surface of the lens.

Then a screw is cut to length (dependant on the thickness of the lens) and screwed in to the lug from the back of the lens, this expands the lug material and pulls the front of the lug on to the frame forming a tight fit.

Two lugs are needed per lens.

A second lug can be cut and used to secure a second lens on the front of the frame by extending the hole in the primary lug in the body of the frame to allow the screw to be inserted in to the second lug that holds the second lens onto the front of the frame.

Where there is a high differential curvature of the lens to the frame the lugs can be positioned closer together to minimize the difference of the edge of the hole in the lens.