Vergence
/ˈvɜː(ɹ)dʒəns/
"Vergence" in a Sentence (2 examples)
a special vertex trial case computed for an object vergence of 4.00.
1947 Benjamin King Johnson, Optics and Optical Instruments: An Introduction with Special Reference to Practical Applications, Courier Corporation (1960 [1947]), p. 152. "Ample movement between the source and condenser should be available in order to allow for a variation in the vergence of the light leaving the condenser"