Make sure your workspace is clean and dust-free
Thoroughly clean your Blade Smart Glasses with a microfiber cloth.

Vuzix Blade Smart Glasses come with a removable nose bridge.
Carefully remove the small Philips head screw and remove the nose bridge, for details see below.
The new frame assembly with the prescription lens is installed where the nose bridge was removed. The prescription lens assembly is screwed in place.

You will need the alternate nose bridge and a phillips-head screwdriver.
Blade Smart Glasses are shipped with an adjustable nose bridge. This adjustable nose bridge can resolve issues if the standard nose bridge does not provide adequate support on your nose.
Using a small Phillips-head screwdriver, carefully remove the standard nose bridge from the frames. Insert the adjustable nose bridge on to the frames and replace the screw, making sure not to over tighten.