First,What is progressive multifocal lens?
More than 1, gradual focus the lens is in the same lens only far between light and nearly run out, by dioptre way of gradual change, from with gradually close to use readings remotely run out and almost run out of organic together, so on a lens at the same time have a look at distance, middle distance and close the required different luminosity.
Progressive lenses have three functional areas
The first functional area is the remote area located at the top of the lens. Distance zone is the number of degrees needed to see far away, used to see distant objects.
The second functional area is the proximity area located at the lower edge of the lens. Proximity is the number of degrees needed to see near objects.
The third area is the middle area that connects the two. It is called the gradient area, which gradually transitions the degree of looking far to the degree of looking close, so that you can use it to see objects in the middle distance. In appearance, progressive multifocal lenses are indistinguishable from regular lenses.
Two, what kinds of progressive multifocal lens?
In recent years, progressive multifocal lens has been developing and popularizing rapidly in China. At present, according to the eye use mode and physiological characteristics of people of different ages, the corresponding research on multi-focal lenses can be divided into three categories:
1. Adolescent myopia control lens. Used to reduce visual fatigue and control the development of myopia.
2. Anti-fatigue lenses for adults. It is used for more people working in close distance to reduce visual fatigue caused by work.
3. Progressive lenses for middle-aged and elderly people. A pair of glasses for middle-aged and elderly people can easily see far and near, so that your eyes can find the feeling of youth.
Three, What is the function of progressive multifocal lens?
(1) Reduce visual fatigue and control the development speed of myopia, but not all adolescents are suitable for wearing progressive multifocal glasses, the population is very limited, the lens only has a certain effect on the adjustment of lag and implicit oblique myopia children.
Note: Because most patients with myopia have external occultation rather than implicit occultation, the number of people suitable for wearing progressive multifocal glasses to control myopia is very limited, which only accounts for about 10% of children and adolescents with myopia.
(2) Teachers, doctors, close distance and too many people using computers, in order to reduce the visual fatigue brought by work.
For middle-aged and elderly people with a pair of glasses to easily see far-sighted near. Progressive multifocal lens is designed to provide a natural, convenient and comfortable way for presbyopia patients to correct. Wearing progressive lens is like using a video camera. A pair of glasses can see distant, close and medium-distance objects clearly. Therefore, we describe progressive lenses as "lenses that zoom", and put on a pair of glasses that are equivalent to paying more for glasses.
Fourth,What should I pay attention to when wearing progressive multifocal lenses?
(1)When selecting a mirror frame, the size of the frame is strict. It is necessary to choose the appropriate frame width and height according to the pupil distance.
(2)After wearing glasses, when observing objects on both sides, you may find that the clarity is reduced and the object is deformed, which is very normal. At this time, you need to turn your head slightly and try to see from the center of the lens, and the discomfort will disappear.
(3)When going downstairs, the glasses should be lower as far as possible from the top to see out of the area.
(4)Glaucoma, eye trauma, acute eye disease, hypertension, cervical spondylosis and other people are not recommended to use.
Post time: Sep-17-2022