If you have high blood pressure, it can be controlled by following your doctor's instructions. Protect Your Eyes From Exposure to Harmful Sunlight Ultraviolet light and blue light can damage your retina and may increase your chances of developing macular degeneration. They can also speed up its development. Therefore, it is extremely important to protect your eyes when you are out of doors. Wear a hat or visor whenever you are outside, even on overcast days.
Ultraviolet light passes through cloud cover and is just as dangerous as direct sunlight.
To be on the safe side, try to find glasses that guard against all ultraviolet rays. A certain percentage of sunglasses are mislabeled, so always buy sunglasses from a reputable dealer. Your optician can check your glasses to measure the UV protection. Most glasses allow some direct sunlight to enter from the top and sides of the frame. There are sunglasses designed specifically for macular degeneration that include side panels and a ridge at the top of the glasses so that all light is filtered.