The fundus, as the name implies, is the deepest part of the eye, so it is impossible to see it directly with the naked eye without the help of professional instrumentation. Therefore, in the past, when technology was not yet developed, it was impossible to understand it clearly, but now, with the development of technology, modern medicine has also made great progress, so the structure of the fundus is now clearly projected by equipment, and it is not a problem to understand it more clearly now. The fundus of the eye mainly includes the vitreous humor and the retina. The important anatomical landmarks in the fundus image are the optic papilla and macula, and the central arteries and veins of the retina can be clearly seen. Because the fundus is located relatively far back in the eye, it requires some examination equipment to be visible. For fundus examination, it is necessary to do it in a special environment, usually in a dark room, where the patient is usually in a sitting position and the doctor examines the fundus of both eyes in turn with a fundoscope. So later on, there are fundus photography examinations, and now the main ones are 45 degree angle fundus photography and 200 degree wide angle photography. So any medical development, is under the premise of modern technology development, only with the technology more and more to developed, can develop more and more advanced medical equipment, open the door to unknown medicine, so that people can more clearly cognitive disease, in order to completely solve the disease, so that we all have a healthy body.