Specialized clip on lenses are perfect for beadmaking and other lampworking activities using soft (moretti) glass. Clip-on lenses fit securely to your round or oval style prescription glasses: they'll protect your eyes AND allow you to see variations in flame and glass color that other shaded safety glasses block out. Many experts say that seeing these different shades of color makes it much easier to achieve the effects you want in your flameworked creations!  
 
Nartique Glass Recommends:  These clip-ons are really nice for people that use corrective glasses. With the clip-ons you can have your correct vision without paying big bucks. The Didymium lens cuts down on soda flare, so you cannot only see better, but reduce eye fatigue while protecting your eyes. Use it when working with soft glass.  Not recommended for borosilicate work.