An official website of the United States government
Here's how you know
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.
Histogram showing the frequency distribution of interocular differences (OD – OS) in spherical equivalent refractive error for each subject. Most subjects had less than 1 diopter difference between eyes.