Xiao Wang’s father had a history of glaucoma, and because of the lack of timely detection and diagnosis, he went to the hospital when he felt poor vision and found that not only was his eye pressure elevated, but he had advanced open-angle glaucoma, and the doctor told him that without treatment and control, he could easily lose his sight completely. For this reason, Wang asked for information about glaucoma during his medical checkup, but after the checkup, he was told that although his IOP was normal, the C/D in his fundus was enlarged. Wang has been in a low mood since he found out: Is it possible that I have glaucoma along with my father? Zhang, who was wearing thick myopic glasses in the same office, originally wanted to persuade Wang, but was shocked to see his own report: IOP was higher than normal! After listening to Wang’s story about his father’s condition, Zhang felt nervous: do I have open-angle glaucoma? In the most common two types of glaucoma, compared with acute closed-angle glaucoma, which can cause severe eye distention and pain, ipsilateral headache, nausea and vomiting, and vision loss, the onset of chronic open-angle glaucoma is very insidious, and some people do not have any symptoms at all until the visual field (i.e., the range of afterglow) is very small, like a tube in front of the eyes can only see a small range, then they will It is only when they go to the doctor and are diagnosed that they often have serious irreversible optic nerve damage, which seriously affects their working life or even gradually lose their light. So. Early diagnosis of chronic open-angle glaucoma is very important. Currently, most good medical check-ups will add some of the tests related to glaucoma, such as measuring intraocular pressure and checking the cup-to-disc ratio (C/D) value of the optic nerve papillae in the fundus. With the massive or even dependent use of various modern electronic display products such as TV, computer, cell phone and iPAD, the incidence and detection rate of open-angle glaucoma has increased substantially, therefore, medical checkups should pay attention to and request the ophthalmology department to add IOP measurement and fundus C/D value examination. So, are Wang and Zhang already suffering from open-angle glaucoma? The diagnosis of open-angle glaucoma cannot be based on just one IOP measurement and solely on the C/D ratio, but requires a comprehensive assessment of all aspects of the index to make the diagnosis. The main tests are: first, the IOP needs to be measured more often, the more the better, at least to understand the patient’s IOP over a 24-hour period between day and night, the baseline level of IOP and the range of peak and trough fluctuations, as well as the time point at which the peak is located, most of which require hospitalization because IOP must be measured at night. This is followed by an examination of visual acuity and visual field to see if the optic nerve has been irreversibly damaged. Then there is an OCT of the optic nerve papillae to measure whether the optic nerve fiber layer has been thinned by IOP and to allow accurate digital quantification of C/D values. Also, the central corneal thickness needs to be measured because most of the current methods of measuring IOP are to detect the actual pressure inside the eye through the cornea, just like detecting the pressure of the inner tire through the outer tire of a bicycle, if the outer tire is thick, we will feel that the pressure of the inner tire is higher than the actual level, while if the outer tire is thin, we will feel that the pressure of the inner tire is lower than the actual level. The same reasoning. If the cornea is too thick, it is possible that the measured IOP will appear slightly higher than the actual one, and if the cornea is too thin, the measured IOP may also appear slightly lower than the actual one. Then, it is also necessary to understand the fluctuation of IOP in some special situations and special stimulation states, for example, the drinking test, which measures the fluctuation of IOP after drinking a large amount of water or liquid, and the dark room and prone test, which are to understand the fluctuation of IOP in special positions in special environments. Sometimes, it is necessary to arrange a CT or MRI of the head. To rule out the effect of cranial brain lesions on the optic nerve. The above-mentioned tests are summarized and evaluated together to conclude whether or not you have chronic open-angle glaucoma. Compared to the general population. People with a family history of glaucoma; people with high myopia, especially if there is no obvious cause for the increasing myopia; people who use their eyes excessively, especially on electronic displays; people with diabetes; and people who use glucocorticoids topically and systemically in the eyes for a long time. Having said that, we all surely understand that both Xiao Wang and Xiao Zhang have abnormalities in some of the examination items, and also each have factors that predispose them to the onset of the disease. Indeed, they should be hospitalized for a comprehensive examination before a final conclusion can be drawn.