If you wear glasses, you may have made a mental list of all the reasons you wish you didn't. The red mark often left on your nose by the frame or pads that hold your glasses in place is likely to be on that list. Beyond having your optometrist properly size your glasses and space your nosepiece to your unique shape, a few other tactics could help ease the frequency or severity of the marks.
Have your optometrist remeasure your glasses size -- represented by three numbers, the width, the bridge of the nose and the temple length to the back of the ear. Make sure your glasses conform to those measurements.
Adjust your nosepiece arms to fine-tune your glasses' fit on the bridge of your nose. Grab each pad and gently bend it to a position that will better yield to your nose. Try your glasses on again to test the new fit. Have your optometrist do this if you worry about breaking your glasses.
Clean your glasses and face regularly to remove oils, make-up or other residue that can irritate your skin when trapped under your glasses.
Remove your glasses, if possible, when you're sweating, which can intensify red marks.
Rotate between two pairs of glasses, preferably one with a frame that rests on the nose and another that employs a nosepiece. This could allow your skin more time to dry out.
Use a moisturiser to battle dry skin, which is more apt to develop red marks. Other cosmetic products, like a toner, can shrink pores and reduce eyeglass marks.
Ask your optometrist about using a different material for your nose piece, if the marks persist. They are made in rubber, plastic, silicon and other materials, all with slightly different qualities.