老視用コンタクトレンズの研究—矩形コンタクトレンズ

Study of contact lens for presbiopia

　コンタクトレンズというものは眼鏡と比較して幾多の長所をもつてはいるが，しかしながら現在未だに解決されていない面も幾つか持つて居る。次のようなコンタクトレンズがもし作られたならば，さぞ便利であろうと思わぬ人は有るまい。

（1）老視用（読書用）コンタクトレンズ

In case aged eyes retain good distance vision, the following condition is most important for a contact lens to fulfill the needs of Presbyopics of such nature. The lens should be so designed as to cover the pupil only when the patient is to see the closer range so that he can use his own eyes when he is to see the distant range. Thus the writer judged that the contact lens for Presbyopia (for closer range) should take the shape of a rectangle, which is shown as Illustration I, and the good feature of the rectangular contact lens isthat "It never does wheel" when blinking or when the eyeball moves.