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 3 Comparison of the internal radius of AF rings with the mean mf ERG P1 amplitude for each of stimulus rings 2 and 3 (A) and rings 4 and 5 (B). All but 2/20 AF rings had internal radii within the annular stimulus area of ring 2 (A). Inset in (B) shows the numbering and concentric arrangement of hexagonal rings; actual stimulus dimensions are shown in figure 4.
