Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Quantitative relationship between best-corrected visual image quality (logVSX), pupil diameter, and age. Black circles are the mean logVSX for the corresponding pupil sizes and means of each age group. (b) Two-dimensional depiction of the same data as in (a). Best visual image quality (logVSX) was found in young eyes (20 to 30 years old) and at small pupil diameters, and decreased as age increased and as pupil size increased, with pupil size causing a more rapid decrease.
