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Premium Progressive Multifocal Optical Lenses - China Suppliers and Factory for Vision Correction
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 4.
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
Who first proposed the concept 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.
What makes progressive lenses different from traditional bifocal lenses?
Progressive lenses feature a multi-focal design with multiple focal points on the same lens, gradually changing from the far zone to the near zone. This design avoids the obvious boundary lines found in traditional bifocal lenses, reducing visual jumping and wearer discomfort.
Who should wear progressive lenses?
They are suitable for individuals with vision issues like farsightedness, myopia, and presbyopia. They are particularly beneficial for middle-aged and elderly people over 40, students who study for long periods, and white-collar workers.
How long does it take to get used to progressive lenses?
It typically takes about one week to adapt to your first pair of progressive lenses. You might experience minor dizziness initially, so it is best to start with static activities before moving on to dynamic ones.
How do I look through the different zones of a progressive lens?
For long-distance viewing, keep your head level and look through the upper center of the lens. For mid-distance viewing (like computer screens), look slightly lower through the middle. For close-up tasks (like reading), look through the lower portion of the lens.
Why is the vision blurry on the outer sides of progressive lenses?
The outer sides of the lens are areas of varying brightness and naturally produce a blurrier field of view. To see clearly, it is recommended to turn your head and eyes toward the object rather than looking through the sides.