Robert Kalin, co-founder and former CEO of online marketplace Etsy, is reportedly building a hand-held, magnifying glass-like ...

Lenses are the key components in eyeglasses, contact lenses, binoculars and telescopes—just to name a few devices. With this activity a homemade magnifying glass is only a drop away! If you're ...

The magnifying glass also enhances the CSSD technician’s ability to spot stains. Stains come in all sizes, shapes and intensity. Sometimes a stain can appear quite benign or may not be easily detected ...