Contact lenses are pretty easy to find nowadays. It wasn't always so, and the increased use of lenses has meant an increase in opportunities to have problems with eyes caused by them.
We chatted to Cristina Patterson of Eye Ink FX about eye care and lenses, especially in the light of many people around us who had created characters for Monsterpalooza using lenses. Many conventions will have extensive makeup characters with lenses bought online or in costume stores for not a lot of money. These lenses may be available in stores, but is it wise to buy and use them?
We also chatted to Bob Smithson, a lens tech with many years experience fitting lenses on set and dealing with the front line of lenses on a production.
http://www.learnmakeupeffects.com/33lenses/