6 июл. 2023 г. · Bifocals are glasses that feature 2 prescriptions in one lens. The upper portion of the lens corrects refractive errors such as nearsightedness ... |
Bifocals are multifocal lenses with two separate optical powers. Simply put, they are one lens bonded to another. |
26 янв. 2024 г. · When you wear bifocal glasses, the two prescription powers in the lenses enable clear vision at different distances. The upper portion of the ... |
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