Mosquitoes, the main symptom is a black shadow floating in front of the eyes, sometimes accompanied by a sense of flashing light, vision loss, or eye pain, eye redness, fear of light, tearing and other symptoms of discomfort and so on. Physiological Aedes aegypti, the main manifestation is that in the light place may obviously see with the eyeball rotation and fluttering black shadow, can present point, line, etc., usually does not affect the vision. Pathological Aedes aegypti caused by hemorrhage, mainly manifested as black shadows in front of the eyes or accompanied by abnormal flashes of light, the black shadows may be a large number or in the form of clumps, a large area, most of which will affect the vision; due to inflammation caused by pathologic Aedes aegypti, in addition to black shadows fluttering and vision loss, but also may appear in the eyes, eye pain, eye redness, fear of light, tearing, and other uncomfortable symptoms. It is recommended that patients seek medical examination in a timely manner, and if it is a pathologic Aedes aegypti, targeted treatment is required.