Definition of "presbyopic"

the Moms, bent way down to me, hand reaching, her lowering face with its presbyopic squint, suddenly stopped, froze, beginning to I.D. what it was I held out […]

1996, David Foster Wallace, Infinite Jest […], Boston, Mass., New York, N.Y.: Little, Brown and Company, page 11

These experiments prove that some alteration has taken place in the eye equivalent to a lengthening of the eye, or a shortening of the principal focus, which enables presbyopics to read without glasses.

2014, Walter J. Kilner, The Human Atmosphere