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単焦点レンズ
一般的な普段使い用のメガネや老眼鏡に使用されます。
おそそ40歳以降の調節力が低下した状態(老眼)では、普段使い用のメガネでは新聞や本などが見えにくくなってきます。
その場合は読書用のメガネ(老眼鏡)等に掛け変える必要があります。
また、老眼鏡では遠くははっきり見えません。
お年を召してから初めて老眼鏡を使用すると、度数が強くて慣れにくい場合があります。
​弱い度数から慣れることや、早めの使用をおすすめします。


単焦点レンズの種類
単焦点レンズの種類は設計で分けると全部で4種類になります。
比較的安価な「球面設計」
近視と遠視の歪みを減らす一般的な非球面である「外面非球面設計」
乱視の歪みを減らし、カーブの付いたフレームに対応できる「内面非球面設計」
両方の特徴を合わせ持ち、一番薄く作る事の出来る「両面非設計」
の4つになります。
​また、最上級グレードとして眼とレンズの位置関係を設計に取り入れ、レンズ本来の性能を引き出す「インディヴィジュアル設計」があります。

 
フェイスプロフィール

★ Design
 《Distance / near lens》
If you are under 40 years old and have not lost your accommodation, you can basically focus on all distances with a distance lens.
If you are over 40 years old and your accommodation is weakening, it may be difficult to focus on a close distance such as a smartphone or book with a distance lens.
In that case, you will need glasses (reading glasses) for near-lens for smartphones, books, and personal computers.
​ * Reading glasses look blurry on TV and distant scenery.



 
The design of distance and near lenses is roughly divided into "spherical design" and "aspherical design".
There are three types of "aspherical design lenses".
General and relatively inexpensive " outer surface aspherical surface "
" Inner aspherical surface " that is effective in correcting astigmatism and can be used for curved frames.
There is a " double-sided aspherical surface " that has both characteristics and can be made the thinnest .

単焦点 比較

​ * The ranking may change depending on the shape and power of the lens.

設計比較

単焦点レンズグレード一覧 NIKON HOYA
単焦点グレード

* This grade is positioned based on the wide field of view, low distortion, price, etc. due to the product design.

​ The grade may change depending on the frequency and the shape of the frame.

* The lens products introduced are examples. In addition to this, we also handle lenses with various functions and performances such as glass lenses, bifocal lenses with boundaries, bifocal lenses, and lenses for small vertical width of the frame.

For details on each distance and near lens

 

Nikon Essilor Official HP

 

To HOYA official HP

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