What are the items of dry eye examination?

Dry eye is dry eye, dry eye examination items generally include tear secretion test, tear film break time, tear osmotic pressure, etc. 1. Tear secretion test Tear secretion test is to evaluate the ability of the eye to produce tears. Generally, by placing a specific filter paper on the inner side of the lower eyelid, the amount of tears absorbed within a certain period of time is measured. Lower tear production may indicate that dry eye is related to impaired tear secretion function.2. Tear film break-up timeTear film break-up time is used to assess the stability of tear formation on the eye surface.A doctor will add a small amount of fluorescent dye to the eye surface and observe how long the dye stays on the eye surface. If the tear stability time is short, it may mean that the tear quality is poor or that the tear film breaks and causes the eye surface to dry. 3. Tear osmolality Tear osmolality is used to assess the concentration of solutes in tears, usually using an osmometer or titration method to measure the permeability of tear samples. Under normal circumstances, the osmotic pressure of tears is within a certain range. If the osmotic pressure is abnormally high or abnormally low, it may indicate abnormal tear composition or tear gland dysfunction.