Presbyopia is a normal physiological state. To clarify whether you have presbyopia you can start with symptoms, examination, and tissue lesions. If it is not presbyopia, you can prevent the appearance of presbyopia by maintaining good eye habits. If it is determined to be presbyopia, you can improve the quality of life by wearing glasses. I. Symptoms: 1. Difficulty in seeing near: You will gradually find that the reading distance you used to be accustomed to, at this time, needs to be gradually lengthened to see the words clearly, and the required reading distance grows with age. At the same time, if you suddenly look far away, and suddenly can not see distant objects, but a period of time can be relieved; 2, reading requires stronger lighting: stronger lighting can increase the contrast between the book and the text, which can improve vision to make reading clearer, but in the past is not needed; 3, can not look at close objects for a long time: due to the eye regulation ability is reduced, in close reading continuous eye After a period of time there are always symptoms of eye fatigue such as dry eyes, sore eyes and tearing. 2. Examination: 1. Visual acuity examination: presbyopia has a reduced ability to see near objects, and it is blurred to see near objects; 2. Refractive state examination: the application of instruments to understand the degree of refraction of the eye, so as to clarify the severity of presbyopia, and the examination results can also be used for prescription optometry. 3. Tissue lesions: In order to see clearly, the eye is overstressed for a long time. This chronic stimulation may lead to chronic inflammatory changes in the eyelids and conjunctiva, which may cause blepharitis, conjunctivitis and other diseases.