Dry eye patients need to do the examination is not painful, mainly to do the eye surface analyzer to check the tear secretion test examination, tear film rupture time examination. Dry eye is a common disease in ophthalmology, which occurs in middle-aged and old people, and is related to the degeneration of the function of the blepharoplasty glands and other functions after ageing, and in some patients, it is related to chronic inflammatory stimulation of the eye. Patients need to undergo an ocular surface analyzer examination to understand the width of the tear river, the stability of the tear film, the tear film refreshing frequency and other indicators, and need to undergo a tear film rupture time examination, as well as a tear secretion test, to observe whether there are abnormalities in the quality of tears and the total amount of tear secretion, in order to confirm the diagnosis and assess the severity of dry eye disease. All of these tests are non-invasive and not painful, so patients do not need to worry.