Making prescription bike shades

I wanted/needed prescription lenses in my biking shades but I can’t afford ready made prescription bike eyewear So, using the lenses out of a pair of my old regular glasses I stuck them on the inside of my bike shades with small dots of Sugru mouldable glue (keeping them a few millimetres from the glass of the shades to get a mild anti-fogging effect) It works a treat, and the Sugru is removable if I want to move the prescription lenses to another pair of shades or change the prescription in the lenses