Bifocal Adaptive Power Reading Glasses - Buy 1 Get 2 FREE (3BCORG9)BIFOCAL ADAPTIVE POWER READING GLASSES, YOUR ENHANCED NEAR VISION COMPANION Bifocal Adaptive Power Reading Glasses Buy 1 Get 2 FREE (3BCORG9) These bifocal rimless adaptive power reading glasses offer clarity for various close distance tasks, with a power range from +0. 5 to +2. 5, such as reading, writing and using digital devices. They also feature zero power distance bifocal lenses. The blue cut lenses help block harmful blue light from screens,