00 The bottom third has the highest strength (and the power you choose) for reading, the middle third has a slightly reduced magnification for computer use, and the top third has about half the strength of the bottom, for clarity when interacting with someone nearby (sitting across a desk, for example)..
Men's Rectangle Reading Sunglasses in Gunmetal with Smoke Lenses by Foster Grant - Braydon SunReaders® - +3. Protective case included.00 Foster Grant® Braydon Multi Focus™ SunReaders® reading sunglasses combine our Multi Focus™ lens technology with 100% UVA-UVB lens protection.00 The bottom third has the highest strength (and the power you choose) for reading, the middle third has a slightly reduced magnification for computer use, and the top third has about half the strength of the bottom, for clarity when interacting with someone nearby (sitting across a desk, for example).