Figure 1.
The probability of the device being still in situ at a given time (in years) after initial placement of Jones’ tubes in 32 eyes prior to 1990 (Kaplan–Meier analysis). Shaded area represents 95% confidence interval.
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.