The hazards of squinting are eye fatigue, myopia and astigmatism. 1. Eye fatigue: when squinting, the eye muscles are hard and in a tense state, resulting in soreness and pain in the eyes and other symptoms, causing eye fatigue. Patients can use eye drops, such as digitalis bisabolol eye drops, to relieve symptoms, but also through the eyes of the local hot compresses to relieve visual fatigue. 2. Deepen myopia: When patients squint to see things, because it is easy to have visual fatigue, it can make myopia progress faster. Patients can go to the hospital in time for optometry, wear appropriate glasses for seeing things clearly, avoid squinting. 3. Astigmatism: squinting is through the pinhole effect and fissure effect to improve visual acuity to a certain extent, so patients with astigmatism tend to squint when they are farsighted, but it is easy to compress the cornea and aggravate astigmatism. Patients are advised to develop good eye habits, avoid eye fatigue, ensure adequate sleep, and go to the hospital for treatment when necessary. It is recommended that patients who experience blurred vision and need to squint to see things should seek prompt medical attention and treatment under the guidance of a doctor.