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.
Comparison of preoperative and postoperative visual acuity in 17 eyes examined at 3 years after trabeculectomy (from a total of 20 trabeculectomy eyes; excluding one combined cataract/glaucoma case and two trabeculectomy eyes not examined at 3 years). Note five eyes with substantial decreases in acuity. For this figure, the value 0.01 was assigned for the seven eyes whose visual acuity consisted of the perception of hand movements.
