The eyes are wet and blurred, mostly due to too much tear fluid in the tear lake, too much tear fluid covering the corneal surface, affecting the refractive state, so that after the parallel light passes through the refractive system of the eye zigzag shot, the focal point formed falls in front of the macular central recess of the retina, showing the eyes to see things blurred. It is generally caused by two major types of diseases: 1. Excessive tear secretion, such as conjunctivitis, keratitis, iridocyclitis, etc. stimulates the tear glands to secrete more tears. Mental stimulation, such as excessive sadness, joy, etc. can cause an increase in tears, nausea, vomiting, sneezing and other reflex stimulation can also cause the lacrimal gland to secrete more tears. 2, tear drainage disorders. Such as tear duct narrowing caused by or insufficiency, dacryocystitis, nasolacrimal duct obstruction, etc. can cause tears can not be timely excreted to the nasal cavity, resulting in tears in the tear lake, corneal surface accumulation, the performance of tears wet, see things blurred.