Best suited for narrow faces.
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). - Unisex Round Reading Glasses in Black by Foster Grant - McKay - +1. Unisex Round Reading Glasses in Black by Foster Grant - McKay - +1. These comfortable frames offer spring hinges, an anti-reflective lens coating, and scratch-resistant lenses.