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Single focus lens

What is a single focus lens?

A single focus lens is a lens used for everyday use or reading glasses.

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Single focus lens grade

If you position the grade in the design, it will be in order from the bottom

・ Spherical design

・ External aspherical design (general aspherical design)

・ Inner surface aspherical design

・ Double-sided aspherical design

・ Individual inner aspherical design

・ Individual double-sided aspherical design

There are 6 types.

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Difference in comfort depending on the grade of single focus lens

Basically, the higher the grade of the lens, the better the performance of the lens and you can use it comfortably.

The performance of a single focus lens refers to "thickness and weight of the lens", "small enlargement and reduction of the contours of the eyes and face when worn", "wide field of view", etc.

​ Depending on the shape, frequency, familiarity, etc. of the frame, the superiority or inferiority of comfort may change.

単焦点グレード
設計比較

Progressive focus lens
What is a progressive lens? A progressive lens is a lens that has multiple powers, such as a bifocal lens and a bifocal lens.
Even if your ability to adjust is reduced due to aging, you can clearly see multiple distances with one pair of glasses.

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Progressive lens grade

When the progressive focus lens positions the grade in the design

・ External progressive design (including general double-sided design)

・ Internal progressive design

・ Double-sided progressive design

・ Individual design

There are four types.

​ There are multiple grades within the same design.

​ ​ ​ In addition, there are some lenses for which information on what kind of design the lens is is not disclosed.

​ * In the case of high-grade double-sided design, it is described as double-sided progressive design or double-sided 〇〇 progressive design.

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Differences in comfort depending on the grade of progressive lens

Basically, the higher the grade of the lens, the better the performance of the lens and you can use it comfortably.

The performance of a progressive lens refers to "wide field of view," "less distortion," "easy to focus," and so on.

It affects "comfort" and "easiness to get used to" more than a single focus.

Also, depending on the shape, frequency, familiarity, etc. of the frame, the superiority or inferiority of comfort may change.

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遠近グレード
見え心地比較
Outer surface progressive design grades 1 and 2
Inner surface progressive design grade 3
Double-sided progressive design
​ Grade 4 or higher
Both single-focus lenses and progressive-focus lenses have different comforts depending on the power, frame shape, individual senses, and familiarity.
​ In addition, the original performance of the lens will not be exhibited unless the power and frame adjustment are appropriate.
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Those who recommend high-grade lenses
≪Myopia, hyperopia, astigmatism are strong≫
The weight of the lens thickness, blurring and distortion of the peripheral vision, and enlargement and reduction of the contour when worn can be particularly reduced.

≪If you are old ≫
With aging, the peripheral vision becomes more blurry and distorted when wearing a progressive lens.
​ Higher grade lenses can reduce them.

≪There is a difference between the left and right frequencies≫
It is possible to reduce the discomfort caused by the difference in size and sharpness between the left and right due to the difference in power.

​ ≪I want high comfort≫
High-grade lenses are recommended for hobbies, work, and daily life where clarity, wide field of view, and ease of focusing are required.

≪The bifocal lens does not fit≫
It's not always a solution, but high-grade bifocal lenses are easier to get used to and easier to use than lower-grade lenses.

If you are not satisfied with the comfort of your glasses, or if you are looking for comfortable glasses, please try high-grade lenses.
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