PROPER WAY OF CARING FOR YOUR EYES.—
Keep a shade on your lamp or gas burner. Avoid all sudden changes between light and darkness. Never begin to read, write, or sew, for several minutes after coming from darkness to a bright light. Never read by twilight, or moonlight. Never read or sew directly in front of the light, window, or door. It is best to let the light fall from above, obliquely, over the left shoulder. Never sleep so that, on first awakening, the eyes shall open on the light of a window. Do not use the eyesight by light so scant that it requires an effort to discriminate. The moment you are instinctively prompted to rub your eyes, that moment stop using them. If the eyelids are glued together on waking up, do not forcibly open them, but apply saliva with the finger—it is the speediest dilutant in the world—then wash your eyes and face in warm water.—Sel.