I wanted to have a pair of wrap-around prescription sunglasses but I couldn't afford to pay hundreds of pounds. If like me you've been wearing glasses for a long time you've probably got several other pairs that you don't use. I decided to cut up my old pair and use the lenses to make a pair of sunglasses. They work well for sports, especially cycling.
This project has a build time of about an hour.
What you'll need:
Cheap pair of sunglasses with thick body around the nose. I found a pair with interchangeable lenses at Lidl for £4.99 (http://www.lidl.com.mt/cps/rde/xchg/SID-C07164F9-83B45C9E/lidl_mt/hs.xsl/index_13321.htm)
Pair of glasses. You can generally get some very cheap glasses at your local opticians. The ones I got were about £20. Make sure they have a decent curvature to the lens and are wire framed.
Drill + 2mm bit