Definition of single-vision in English:

single-vision

Line breaks: single-vision

Entry from British & World English dictionary

adjective

Denoting glasses of which each lens is a single optical element; not bifocal.

Definition of single-vision in:

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Word of the day demoralize
Pronunciation: dəˈmôrəˌlīz
verb
cause (someone) to lose confidence or hope; dispirit