hyperacuity

noun

hy·​per·​acu·​i·​ty ˌhī-pər-ə-ˈkyü-ə-tē 

-a-

variants or hyper-acuity

: greater than normal acuteness of a sense

Her anarchy is perfectly balanced with her hyperacuity about tone and timbre and atmosphere and drift.

—Charles Baxter

especially : visual acuity that is better than twenty-twenty

Word History

First Known Use

1887, in the meaning defined above

Medical Definition

hyperacuity

noun

hy·​per·​acu·​ity ˌhī-pə-rə-ˈkyü-ət-ē 

plural hyperacuities

: greater than normal acuteness especially of a sense

specifically : visual acuity that is better than twenty-twenty compare grating acuity, stereoacuity, vernier acuity