The eyes are the window to the soul, but because they are in direct contact with the outside world, they are prone to infections and other problems. People who use their eyes for a long time and have eye diseases should check their eyes every day to see if they have any of the following symptoms. If you find symptoms, seek medical attention as soon as possible. 1, eyebrow hair loss: hyperthyroidism or hypothyroidism. Eyebrows will gradually thin out with aging. However, a loss of 1/3 of the outer eyebrows is a symptom of thyroid disease (hyperthyroidism or hypothyroidism). If you find symptoms, you should seek medical attention. 2. Wheals that won’t go away: sebaceous gland cancer. If the red bumps (wheals) inside or outside the eyelid do not disappear in 3 months or appear repeatedly in the same place, and eyelashes fall off, you should be concerned about sebaceous gland cancer. Early diagnosis and surgical removal is recommended. 3.Yellow spots on eyelids: high cholesterol. Yellow spots on the eyelids are fatty deposits that form on the eyelid area due to high cholesterol. It is recommended to see an ophthalmologist or dermatologist. 4. Burning eyes or blurred vision when looking at the computer: computer vision syndrome. People have fewer tears in their eyes in middle age, and eye discomfort such as blurred vision can occur when using a computer for too long. Flat LCD display is better than the old display. To avoid screen reflections, eyes flat on the screen, regular breaks from the distance, avoid air conditioning fans blowing against the eyes. 5. Increased eye secretions: Blepharitis. Increased eye discharge is the result of blepharitis, which is often closely related to dandruff and acne. Accompanying symptoms include: burning eyes, tearing or dryness. It is recommended that a warm, moist towel be applied to the eyes for 5 minutes after washing hands and that a doctor be seen in severe cases. 6. Blind spots, flashes of light or wavy lines in the visual field: migraine. Changes in blood flow to the brain are its cause. When this symptom occurs while driving, you should stop and rest immediately. If the symptoms last more than 1 hour, you should see a doctor. If accompanied by fever, muscle weakness or slurred speech, you should consider the risk of stroke and must seek medical attention urgently. 7. Red and itchy eyes: eye allergy. Red eyes, accompanied by sneezing, coughing, nasal congestion or runny nose, are eye allergies. Allergens include: pollen, dust or animal dander, etc. It is recommended to stay away from allergens and use antihistamines, eye medications or eye ointments under the guidance of a doctor. 8. Sudden onset of double vision, darkness in front of the eyes or inability to see: Stroke. In addition to visual changes, stroke symptoms include: sudden numbness or weakness of the limbs or face (especially on one side), difficulty walking, dizziness, loss of balance or coordination, slurred speech or unbearable headache, it is recommended to call 120 for help immediately. 9, dry eyes and photophobia: dry syndrome. Dry syndrome is a chronic, systemic autoimmune exocrine gland lesion, commonly seen in women over 40 years old with rheumatoid arthritis or lupus. Dry eyes and photophobia and dry mouth usually occur at the same time. It is recommended to drink more water and seek prompt medical attention.