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.
IOL = intraocular lens, MD = mean difference, CS = contrast sensitivity, SD = standard deviation, IV = inverse variance, CI = confidence interval, SE = standard error, OR = odds ratio.
