How is the diagnosis of unsustainable near vision?

  The discomfort felt by presbyopes varies from person to person, as it is related to the individual’s underlying refractive status, eye habits, occupation and hobbies. For example, a person engaged in close up fine work will have a much stronger subjective sensation of presbyopia than a traffic cop whose primary task is to view distant vehicles and traffic lights. The diagnosis can be made based on the test results of hyperopia and combined with the patient’s age and clinical presentation.  1. Difficulty in seeing near Patients will gradually find that they cannot read small fonts clearly at the usual accustomed working distance. In contrast to myopic patients, patients will unconsciously tilt their heads back or take books and newspapers farther away in order to read the words clearly, and the required reading distance increases with age.  2. Reading requires stronger illumination At first, reading at night is somewhat uncomfortable because the light is dimmer at night. Insufficient illumination not only raises the visual discrimination threshold, but also dilates the pupil, which forms a larger diffusion circle on the retina, thus making the symptoms of presbyopia more obvious. As we age, it is easy to get fatigued even when working at close range during the day, so people with presbyopia like to use brighter lights for reading at night. Sometimes the light is placed in the middle of the book and the eye, which not only increases the contrast between the book and the text, but also makes the pupil narrow. But the light in front of the eye is bound to cause glare interference, the closer the light source of this interference to the visual axis, the greater the impact on vision. Some elderly people like to read books in the sun, that is the reason.  3, the near vision can not last Adjustment is not enough is the near point gradually become far, after efforts can also see clearly near objects. If this effort exceeds the limit, causing ciliary tension, and then look at distant objects, because the ciliary tension can not immediately relax, thus forming temporary myopia. When looking at a near object again, there is a short period of blurring, which is a sign of a dull adjustment response. Fatigue occurs when the ciliary muscle is nearing its functional limit and cannot keep working. Because of the hypoacusis, the patient has to work at close range near the limit of accommodation of both eyes, so it cannot last. At the same time, due to the linkage effect of regulation collection, over-regulation causes excessive collection, which is also a factor that produces discomfort, so reading newspapers is easy to serially, and the words become double, and finally it is impossible to read. Some patients may even experience visual fatigue symptoms such as eye swelling, tearing, headache, and eye itching.