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Premium Progressive Multifocal Optical Lenses from China Suppliers - Factory Direct Quality and Comfort
Historical Background
The concept of progressive multifocal lenses was first proposed by Owen Aves in 1907, inspired by the shape of an elephant's nose. This type of lens has a high usage rate in Europe and America, and has gradually become popular in China in recent years.
Through the above description, we can comprehensively understand the definition, characteristics, usage methods, and historical background of progressive lenses, which can help us better choose and use this vision correction tool.
Characteristic
Multi focal design:
Progressive lenses have multiple focal points on the same lens, gradually changing from the far zone to the near zone, avoiding the obvious boundary lines of traditional bifocal lenses and reducing visual jumping and wearing discomfort.
High comfort:
The wearer does not need to frequently adjust the focal length, reducing visual fatigue and eye adjustment burden, and improving the comfort of wearing.
Wide applicability:
Suitable for people with vision problems such as farsightedness, myopia, and presbyopia, especially for middle-aged and elderly people over 40 years old, students who use their eyes for a long time, and white-collar workers.
Usage and Precautions
Adaptation period:
It may take about a week to adapt to wearing progressive lenses for the first time, during which you may feel dizzy. It is recommended to start with static activities and gradually transition to dynamic activities.
Correct use (Long distance zone):
When driving or looking, slightly retract your chin and keep your head level, looking through the center of the lens slightly higher.
Mid distance zone:
When viewing a computer screen, look slightly lower in the middle of the lens and adjust the neck position slightly until the image is clear.
Close range area:
When reading a newspaper, place it in front of you, slightly extend your chin forward, and adjust your gaze downward to the appropriate mirror area.
Avoid using blurry areas:
The areas on both sides of the lens are areas of varying brightness, and the field of view is relatively blurry. It is recommended to rotate the head and eyes as much as possible for clear viewing.
Frequently Asked Questions
What is the historical background of progressive lenses?
The concept of progressive multifocal lenses was first proposed by Owen Aves in 1907, inspired by the shape of an elephant's nose. While historically popular in Europe and America, they have become increasingly popular in China in recent years.
What are the main characteristics of progressive multifocal lenses?
Progressive lenses feature a multi-focal design with multiple focal points on a single lens that transition gradually from the far to the near zone. This eliminates the obvious boundary lines of traditional bifocal lenses, reducing visual jumping, minimizing visual fatigue, and offering high wearer comfort.
Who should wear progressive lenses?
They are highly suitable for individuals with vision issues such as farsightedness, myopia, and presbyopia. They are especially beneficial for middle-aged and elderly individuals over 40 years old, students who use their eyes for long periods, and white-collar workers.
How long is the adaptation period for progressive lenses?
It typically takes about one week to adapt to progressive lenses for the first time. During this initial adaptation period, you might experience mild dizziness. It is recommended to start with static activities before gradually transitioning to dynamic actions.
How do I use the different viewing zones of the lens correctly?
For long distances (driving), keep your head level and look through the slightly higher center. For mid-distances (computers), look slightly lower through the middle of the lens. For close ranges (reading), look downward through the bottom portion while slightly extending your chin forward.
Why is the vision blurry on the sides of progressive lenses?
The areas on both sides of the lens are designed with varying brightness, which naturally results in a blurrier field of view. To see clearly, it is recommended to rotate your head and eyes together toward the object rather than looking sideways through the edges of the lens.