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.
Figure 2 Pair of examinations simulating the HDI before (A) and after (B) rigid gas‐permeable contact lens fitted for postsurgical irregular astigmatism, showing a reduction in HDI from 81.72% without the lens to 2.35% with the contact lens in place. FP, false positive; FN, false negative.
