With the popularization of health care knowledge and the progress of medical science and technology, human life expectancy has been significantly extended, and the arrival of an aging society is near, which indicates that more and more “middle-aged and elderly” will remain in the workplace to contribute to society. Therefore, improving the quality of life and prolonging the youth of the aging population has become a hot topic in the field of science and technology. It is an inevitable physiological phenomenon that various organs of the human body will gradually age and decline in function as we grow older. The most regrettable is probably the emergence of presbyopia (commonly known as presbyopia). Because the appearance of presbyopia comes earlier than other aspects of age-related changes, involving a wider range of people, bringing inconvenience and obstacles to people’s lives and work is also more obvious, so presbyopia glasses have become an indispensable “equipment” for many older people. In order to overcome the trouble of frequent change of lenses when seeing far and near, many elderly people are used to wear bifocals, and bifocals also have some disadvantages that are difficult to overcome, mainly: unclear vision in the middle distance; excessive “jump” phenomenon between far and near, which can cause inconvenience in action; there are obvious visible divisions on the lenses, affecting the appearance. This led to the creation of the progressive multifocal lens, which was introduced in France in 1959. Over the past 40 years, with the continuous progress of technology, and after repeated practice and improvements, the lenses have been perfected in all aspects. The distance prescription of these lenses is at the top of the lenses and the near prescription is at the bottom of the lenses, and between the distance and near areas is the transition zone of gradual change of refractive power, which organically connects the distance and near optical areas into one. It not only solves the problem of using one pair of glasses to see both far and near, but also adds a new function – making it possible to see objects at intermediate distances. By wearing these lenses, the elderly can see objects or characters at any different distances, both far and near, as well as young people, without having to change their glasses. Progressive multifocal lenses refer to a transition zone of continuous change in refractive power between the fixed distance zone above the lens and the fixed near zone below the lens, which is called the progressive zone. In this zone, the refractive power (prescription) of the lens increases gradually through the gradual decrease of the radius of curvature of the lens. At present, due to the improvement of their own cultural quality and economic development, the middle-aged and elderly people tend to be more youthful in terms of health and self-image, and progressive multifocal glasses are gradually accepted by some middle-aged and elderly people who are younger in image and psychology. These middle and old people often have the following psychological characteristics: 1, hope to avoid the trouble of wearing and taking off when wearing ordinary presbyopic glasses; 2, do not like the unsightly appearance of bifocals and the jump phenomenon when seeing things; 3, like to try new things – especially the middle and old people with the spirit of adventure in the middle distance modalities. Recent statistics from the United States show that: more than 80% of middle-aged and elderly people who have tried to wear progressive multifocal glasses like and finally choose progressive multifocal lenses, and the proportion of the original bifocal lens wearers is higher. Generally speaking, wearing progressive multifocal glasses need to go through the following steps: 1, detection of presbyopia, that is, optometry. Correct detection of presbyopia is the first step in the successful fitting of progressive multifocal lenses, while distance optometry – the detection of refractive error is the basis for detecting presbyopia. 2. Progressive multifocal lens fitting for presbyopia. There are usually three stages: choosing the initial reading add-on lenses; adjusting the reading add-on lenses; and determining the final near reading prescription. 3. Trial lenses with progressive multifocal lenses. For those who wish to try on progressive multifocal lenses or those who want to try but have doubts, a trial lens fitting demonstration can be given. To facilitate fitting and comparison, trial lenses should generally consist of a series of lenses such as progressive multifocal, single light and corresponding bifocal. The choice of frame: gradient lens fitting process, the choice of the appropriate frame is very important. Specific attention should be paid to the following points: the stability of the frame should be good, generally should not choose easy to deform the frameless frame. The frame must have enough vertical height, otherwise the cutting edge is easy to cut the near part, usually the height of the frame should not be less than 35 mm. The inner area of the nose of the rim must be sufficient to accommodate the gradient area; the frame should have the ability to adjust the vertical height of the bracket leaves. The eye-to-eye distance of the frame should be as small as possible without touching the eyelashes. Adjust the angle of the front of the frame according to the facial features of the wearer, so that the frame matches the face as much as possible, which helps to maintain an adequate gradient field of vision. The process of fitting progressive multifocal lenses is divided into the following steps: adjustment of the frame; ordering of the lenses; cutting of the edges and fitting of the frame; inspection and verification; instruction of fitting.