Case Xiaoming’s grandmother has always been in good health, and has never been sick in her seventies, but her eyes are very blurry and blurred, and the community doctor said that she has cataracts, so the family thought that this is the case when she is old. But one day, grandmother suddenly right eye eye pain, headache, and vision loss, accompanied by nausea, vomiting, the family was shocked, rushed her to the nearby hospital emergency. The family was frightened and rushed her to the emergency room of a large hospital nearby. She first saw the gastroenterology department, then the neurology department, and was given fluids and a CT scan of the head, but the cause of the illness could not be found, and her symptoms did not get better. An experienced internal medicine doctor suggested that she go to the ophthalmology department. This look does not matter, soon found that the right eye intraocular pressure up to more than 50mmHg (normal less than 21mmHg), a clear diagnosis for the right eye acute closed-angle glaucoma acute attack and cataract. After a series of timely treatment to reduce intraocular pressure, the elderly eye pain and headache symptoms finally gradually improved. After the doctor’s advice, she underwent surgical treatment and preventive treatment for her left eye, her intraocular pressure was well controlled and her vision was restored to a certain extent, gradually resuming her normal life. Cataracts affecting vision require surgery, which is a frequent scene in ophthalmology emergencies. Why would an elderly person with cataracts and no other eye disease suddenly develop severe glaucoma? It has to do with the fact that not much is known about how common cataracts can turn into very serious glaucoma in some patients. Cataracts are an extremely common eye disease that severely affects vision, and nowadays, thanks to technological advances, cataracts can be completely cured by surgery. However, glaucoma is different. It is a very serious blinding eye disease, usually caused by high intraocular pressure, and is incurable. So the danger of glaucoma far exceeds that of cataracts. Cataract in the process of formation and development, with the patient’s age, the lens swells, the volume increases, pushing the iris forward, in the eyes of some patients who originally shallow anterior chamber periphery is prone to iris root forward to block the eye of the structure of atrial aqueous outflow anterior chamber angle, resulting in atrial aqueous outflow is blocked, there is aqueous humor accumulation, intraocular pressure rises, i.e., acute attack of glaucoma. There is also a situation where a cataract patient fails to undergo timely surgical treatment, resulting in the cloudy lens becoming “overripe”. The protein content in the cloudy lens will leak out of the crystal and cause an inflammatory reaction, which can also block the pathway for aqueous humor to flow out of the room, causing an attack of glaucoma. Therefore, cataracts should be operated as early as possible if they affect vision to a certain extent. The saying that “cataracts should be operated only when they have matured and become invisible” is often circulated among the elderly, but this is actually a concept from 20 to 30 years ago because of the limitations of medical technology and surgical level at that time. Nowadays, cataract ultrasonic emulsification surgery is very mature, so there is no need to wait until the cataract is ripe for surgery. If this concept is not changed in time, the patient misses the best time for surgery, not only will the cataract overcook, and even cause acute glaucoma, leading to irreversible blindness. Three types of cataract patients are prone to glaucoma 1, there is a family history of glaucoma, farsightedness, shallow anterior chamber, thin, short neck, morning vision is significantly better than the night. 2, in the evening or dimly lit places, easy to appear eye soreness, headache, rainbow vision (see the light source with a halo or halo, see the light bulb in the evening appeared red and green aperture), and even headache, nausea, vomiting and other manifestations of the person. 3. Patients with chronic high blood pressure, diabetes mellitus, and an anxious or worried temperament should go to the hospital for an early checkup and ask the ophthalmologist for help in determining whether there is a risk of a glaucoma attack. If the glaucoma is caused by cataract swelling and over-ripening, which is also known as crystalline glaucoma, the patient’s disease is not very long, and the damage to the visual field and optic nerve is not serious, early cataract surgery can solve the problems of both cataract and glaucoma. If the disease progresses further and there is atrial angle adhesion, a certain degree of atrial angle separation on top of cataract surgery can also solve the problem. However, if cataract and glaucoma have occurred for too long, resulting in irreversible atrial angle adhesion, inability to drain the aqueous humor, and at the same time the clouding of the crystalline lens is so severe that vision has been seriously affected, then combined glaucoma and cataract surgeries are required in order to control the intraocular pressure. All of these need patients to go to the hospital for a detailed ophthalmologic examination, the doctor will be combined with the medical history to make a comprehensive judgment.