Vergence
/ˈvɜː(ɹ)dʒəns/ noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 The simultaneous turning of both eyes when focusing. countable, uncountable
- 2 A measure of convergence or divergence of rays. countable, uncountable
"a special vertex trial case computed for an object vergence of 4.00."
- 3 The direction of the overturned component of an asymmetric fold. countable, uncountable
Synonyms
All synonymsExample
More examples"a special vertex trial case computed for an object vergence of 4.00."
Etymology
From verge (“tend, incline”, from Latin vergere) + -ence, synonym of earlier (1660s) vergency (the equivalent of French vergence). Coined as a technical term in ophthalmology, as a hypernym of convergence and divergence, in 1902. The sense of the numeric quantity in geometric optics was introduced, from use of the term in physiological optics, in the 1920s.