The etiology of dry eye Dry eye is a general term for many diseases called tear film-eye, with various causes and complicated pathological process. Recently, it is considered that ocular surface changes, immune-based inflammatory response, apoptosis and changes in sex hormone levels are related factors for the occurrence and development of dry eye, but the relationship between these factors is still unclear.
The common symptoms of dry eye are dry eyes and foreign body sensation, while other symptoms include burning sensation, itching sensation, photophobia, red pain, blurred vision, fatigue, sticky filamentous secretion and so on. If you have the above symptoms, you should ask the medical history carefully and find the cause. For severe dry eye, ask whether it is accompanied by dry mouth and joint pain to rule out SS.
The symptoms of dry eye vary from person to person. Most patients complain of foreign body sensation, burning sensation and general eye discomfort. These discomforts are usually described as scratching, dry eyes, pain, feeling of sand, tingling or burning. These discomforts are often proof of dry eye, because the corneal surface is covered with sensory nerve endings. A considerable proportion of patients have photophobia and intermittent blur or other vision problems. ?
People with dry eye often complain that their eyes are easily tired, which makes it difficult to read and watch TV. The reason for these difficulties is that when the work requires concentration, the frequency of blinking is obviously reduced. When the blink frequency is significantly reduced, the evaporation time of tear film will be significantly prolonged. If you don't blink enough, the exposure time of corneal conjunctiva will exceed, however, resulting in the formation of one or more dry spots on the corneal surface. ?
Measures to prevent dry eye develop the habit of blinking more. Dry eye is a stress-type disease, the problem is that the eyes stare at one direction for a long time. Therefore, the best way to avoid eye fatigue is to rest properly and avoid continuous work.
(1) It is very important to match a pair of suitable glasses. People over 40 should wear bifocal lenses, or wear glasses with low degree when typing.
(2) Working posture and distance are also very important. Try to keep a distance of 60cm, adjust the most suitable posture, and keep the line of sight down about 30. Such an angle can relax the neck muscles and minimize the area of the eyeball surface exposed to the air.
Precautions before the treatment of dry eye?
Eat more fruits and vegetables People who have been engaged in computer operation for a long time should eat more fresh fruits and vegetables and increase the intake of vitamins A, B 1, C and E. In order to prevent dry cornea, dry eyes, decreased vision and even night blindness, computer operators should eat more foods rich in vitamin A, which can effectively inhibit cell oxidation. The main functions of vitamin E are: lowering cholesterol, removing garbage in the body and preventing cataracts. Walnuts and peanuts are rich in vitamin E, and vitamin B 1 can nourish nerves. Green leafy vegetables contain a lot of vitamin B 1. Drink green tea properly every day, because lipopolysaccharide in tea can improve the hematopoietic function of the body, and tea also has the function of preventing radiation damage.
The environment should be soft. In order to avoid the reflection or unclear screen, the computer should not be placed on the opposite or back of the window, and the ambient light should be soft. If there is a window behind the operator, the curtain should be closed to avoid bright light directly shining on the screen, reflecting bright images and causing eye fatigue. Usually, the average person blinks less than 5 times per minute, which will make his eyes dry. When a person works in front of a computer, he blinks only one-third of the usual frequency, thus reducing the secretion of lubricants and enzymes in his eyes. You should blink more and rest at least once an hour.
Reduce eye dryness In order to reduce eye dryness, corneal nutrient solution can be used appropriately at the eye point. Such as: Befu Shu eye drops, Xiao Laiwei eye drops and some artificial tears. In addition, eye exercises can also relax eyes and reduce visual fatigue.