*Reading Glasses.*—Many people whose eyes are weak, because slightly defective, find great relief in the use of special glasses for reading and other close work. By using such glasses they may postpone the time when they are compelled to wear glasses constantly. It is in the close work that the extra strain comes upon the eyes, and if this is relieved, one can much better withstand the work of distant vision. The reading glasses should be fitted by a competent oculist, and used only for the purpose for which they are intended. *General Precautions in the Use of the Eyes.*—If proper care is exercised in the use of the eyes, many of their common ailments and defects may be avoided. Any one, whether his eyes are weak or strong, will do well to observe the following precautions: 1. Never read in light that is very intense or very dim. 2. When the eyes hurt from reading, stop using them. 3. Never hold a book so that the smooth page reflects light into the eyes. The best way is to sit or stand so that the light passes over the shoulder to the book. 4. Never study by a lamp that is not shaded. 5. Practice cleanliness in the care of the eyes. Avoid rubbing the eyes with the fingers unless sure the fingers are clean. If the eyes are weak, use them less and avoid, if possible, reading by artificial light. Weak eyes are sometimes benefited by bathing them in warm water, or with water containing enough salt to make them smart slightly. Boracic acid dissolved in water (40 grains to 4 ounces of distilled water) is also highly recommended as a wash for weak eyes. [Fig. 165] Fig. 165—*Method of procedure in lifting the eyelid* (Pyle).