Conjunctival xerosis (conjunctival dryness) is a phenomenon of conjunctival dryness that occurs mainly as a result of lesions in the conjunctival tissue itself, and has a variety of causes. Under normal conditions, the tear fluid secreted by the lacrimal gland and conjunctival cup cells keeps the conjunctiva constantly moist, but once the above moisturizing function is disrupted, conjunctival xerosis occurs. Conjunctival dryness can be divided into epithelial conjunctival dryness and substantial conjunctival dryness. Clinical application of cod liver oil eye drops, along with antibiotic solution and eye ointment to prevent and treat secondary infections, corneal ulcers and corneal softening. Measures to prevent conjunctival dry spots are as follows: 1, develop the habit of blinking more Dry eye disease is a stress-type condition, the problem lies in the eyes staring in one direction for a long time. Therefore the best way to avoid eye fatigue is to take proper rest and avoid continuous operation. (1) It is important to have a proper pair of glasses. For people over 40 years old, it is better to use bifocal lenses or, when typing, to wear glasses with a lower prescription. (2) work posture and distance is also very important, try to maintain a distance of 60cm, adjust a most appropriate posture, so that the line of sight can be maintained down about 30 °, such an angle can make the neck muscles relax, and make the surface of the eye exposed to the air to minimize the area. 2, eat more fresh vegetables and fruits Long-term computer operators, should eat more fresh vegetables and fruits, while increasing the intake of vitamins A, B1, C, E. To prevent corneal dryness, dry eyes, vision loss, and even night blindness, computer operators should eat more food rich in vitamin A, vitamin C can effectively inhibit cell oxidation. The main role of vitamin E is to: lower cholesterol, remove garbage from the body, and prevent cataracts. Walnuts and peanuts are rich in vitamin E. Vitamin B1 can be nutritious nerves, green leafy vegetables contain a lot of vitamin B1. daily green tea can be appropriate to drink, because of the lipopolysaccharide in the tea, can improve the hematopoietic function of the body, the tea also has the function of anti-radiation damage. 3, the computer placed correctly In order to avoid reflections or unclear fluorescent screen, the computer should not be placed on the opposite side of the window or the back of the environmental lighting should be soft, if the operator behind the window should be pulled on the curtains, to avoid the bright light directly to the screen reflecting a bright image caused by eye fatigue. Usually, the average person blinks less than 5 times per minute will make the eyes dry. A person working in front of a computer blinks only one-third as often as usual, thus reducing the secretion of lubricants and enzymes in the eyes. You should blink more often and let your eyes rest at least once every hour. 4, corneal nutrient solution in order to reduce the dryness of the eyes, can be appropriate in the eye point with corneal nutrient solution. Such as: BeiFu Shu eye liquid, XiaoLaiWei eye liquid and some artificial tears. In addition, eye exercises can also play a role in relaxing the eyes and reducing visual fatigue.