PCT got it right... anything with presby in front comes with old
age...
Presbyopia
This refers to a progressive reduction in the eyes ability to
focus, which leads to a consequent difficulty in reading at the
normal distance.
It usually starts at middle-age, and is due to age-related loss of
elasticity of the lens.
Presbyacusis
For this, it refers to progressive impairment of hearing that
occurs with aging, especially as regards to high-frequency sounds
(degeneration or more rather, the loss of hair cells in the
cochlear comes with age and cumulative trauma from high pitched
sounds).
