Table 2 Effective visual field stimulus sizes projected onto the retina, both as specified by the manufacturer and with allowances for deviations due to microsaccadic eye movements.

From: Custom extraction of macular ganglion cell-inner plexiform layer thickness more precisely co-localizes structural measurements with visual fields test grids

 

Effective VF stimulus size

Effective VF stimulus size with microsaccade allowance

Angle subtended (°)

Area (mm2)

Angle subtended (°)

Area (mm2)

GII

0.22

0.00298

0.72

0.0433

GIII

0.43

0.0119

0.93

0.0691

GV

1.72

0.191

2.22

0.351

  1. This has been previously reported to be 30 min of arc31, 32, equivalent to 0.5°
  2. VF visual field, ° degrees, mm millimeters, GII Goldmann II, GIII Goldmann III, GV Goldmann V.
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