To care for your eyes, you must be a healthy weight. Obesity leads to diabetes which can create great damage to your eyes. It also leads to glaucoma, hypertensive retinopathy and other conditions which can lead to blindness. The healthier your body is, the healthier your eyes will be, so lose weight!
If you are a smoker, butt out! Of course, smoking will lead your eyes to yellow and the skin around them to wrinkle and thin. On top of that, smoking is linked to a high risk of macular degeneration, cataracts and even damage to the optic nerve, all of which can lead to blindness.