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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
What is the origin of the progressive multifocal lens concept?
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 more comfortable than traditional bifocal lenses?
Progressive lenses have multiple focal points on the same lens, gradually changing from the far zone to the near zone. This avoids the obvious boundary lines of traditional bifocal lenses, reducing visual jumping and eye fatigue.
Who can benefit from wearing progressive lenses?
They are suitable for people with vision problems such as farsightedness, myopia, and presbyopia. They are particularly beneficial for middle-aged and elderly individuals over 40 years old, students, and white-collar workers who use their eyes for long periods.
How long is the adaptation period for progressive lenses?
It typically takes about one week to adapt to wearing them for the first time. It is normal to feel dizzy initially, so starting with static activities and transitioning to dynamic ones is recommended.
How should I adjust my head and gaze position when using progressive lenses?
For long distances, look through the upper center of the lens with a level head. For mid-distances (like computer screens), look through the middle-lower part. For close ranges (like reading), look through the bottom part of the lens and slightly extend your chin.
Why is my peripheral vision blurry when using progressive lenses?
The areas on both sides of progressive lenses are zones of varying brightness and naturally have a blurry field of view. To see clearly on the sides, it is recommended to rotate your head rather than just moving your eyes.