It’s odd to think that our eyes can be damaged by light, but they can. UV light from the sun can cause eye cancer, cataracts, and growths on the eye. When buying sunglasses to protect your eyes, don’t choose them by the color, since darker glasses don’t give more protection. Instead, buy sunglasses labeled as giving 100% protection against UVA/UVB radiation.
While you don’t need to buy glasses that make you look like a bug, bigger lenses do provide more protection. If you aren’t comfortable with sunglasses, try a hat with a wide brim. You’ll be able to carry your shade with you.