I f your job involves sitting in front of a screen all day, there’s a good chance your eyes are paying the price. After hours ...

a blind spot in the central vision of one or both eyes, increased sensitivity to light, a headache, distorted vision, such as a straight line looking bent, and colors looking differently than normal.

Psychologist Paul Ekman has distinguished between smiles that represent genuine happiness (“Duchenne” smiles), and fake smiles that might be used to feign happiness, or cover some other emotion.