What Are the Advantages and Disadvantages of Multifocal Lenses?

The original intention of progressive multifocal lens design was to provide a natural, convenient and comfortable correction method for presbyopia patients. Wearing progressive multifocal glasses is like using a camera to take pictures. A pair of glasses can not only see the distance, but also see the near and medium distance objects. Therefore, we describe progressive lenses as "lenses that can zoom", and a pair of progressive multifocal glasses is equivalent to the use of multiple glasses.

Advantages of multifocal glasses

The lens looks like a monocular lens, and there is no demarcation line of degree change. It not only looks beautiful, but also protects the wearer's age privacy. So, we don't have to worry about divulging age secrets because of wearing progressive multifocal glasses. Especially for those who use computers for a long time, they can choose sightline multifocal computer reading glasses and eyekeeper computer glasses.

Progressive multifocal glasses, such as digital multifocal lenses and varifocal reading glasses, are comfortable to wear and easy to adapt to, which is easy to accept.

The degree will increase gradually. And the substitution of accommodation increases gradually according to the shortening of visual proximity. Therefore, there is no fluctuation of adjustment and it is not easy to cause visual fatigue.

Clear vision can be obtained from all distances within the visual range. Progressive computer reading glasses and progressive reading glasses with transition lenses can meet the needs of long distance, short distance and medium distance at the same time, which brings good news to teachers, doctors, music workers and computer operators. Because these people not only need to see far and near objects, but also can see objects in the middle such as a blackboard, piano score and computer screen most of the time. This is not possible with any lenses other than progressive multifocal lenses.

Disadvantages of multifocal glasses

There are some deformation areas on the left and right sides of the gradual multifocal lenses. For people who are relatively sensitive, it may take time to adapt when they first wear multifocal glasses. That's why some people feel uncomfortable wearing gradient multifocal glasses.

People who are prone to carsickness or have inner ear diseases may suffer from dizziness, nausea, vomiting and other symptoms due to their inability to tolerate the slight deformation of visual objects, and it is difficult to adapt in a short time.

The reading area of graded multifocal lenses is lower than that of ordinary bifocal lenses. It is difficult for people with short necks and cervical vertebra problems to maintain such reading posture.

In addition, people who are used to bending back and bowing their heads in close reading are also more difficult to adapt to the lens.

With the research of "myopia development and accommodation theory", progressive multifocal lenses are gradually applied to control the development of juvenile myopia. The relationship between long-term close reading and the occurrence and development of myopia has always been recognized by myopia researchers. At the same time, we should also pay attention to the sun protection of glasses. You should wear progressive reading sunglasses and design optics reading glasses when you go out.