One pair for everything — I no longer carry three cases in my purse!
Before discovering BlueLume, my purse was weighed down with three separate pairs of glasses: one cheap drugstore pair for checking grocery receipts and reading texts, a heavy anti-glare pair for working on my office desktop, and polarized prescription sunglasses for driving. Switching constantly throughout the day was exhausting and I was always misplacing one. BlueLume completely revolutionized my routine. I walked outside into bright Denver sunshine and the lenses darkened into rich sunglasses within forty seconds. When I stepped inside a coffee shop, they cleared up seamlessly and let me read my phone without squinting. At under an ounce, they feel weightless on my nose with zero red marks. I cannot recommend these enough to anyone tired of the reading glasses juggle.