With adjustable diopter, you can adjust the power for each eye according to your vision. Applicable diopter: +0.5D to +4.0D - Company Name: Presby - Model Name: d-o-Active - Vision correction glasses - Features: Adjustable focus - Accessories: Storage case - Color: Violet - Material: Plastic List Price: ¥7,980 (tax included) I bought these online but only tried them on about twice. As these are stored at home by an amateur, please only purchase if you understand this.