Table 1.

Scoring system used for the assessment of retinal boundary detection errors

1 point	Any boundary detection error (deviation of at least 4×10 pixels [height x width])
1 point	Any boundary detection error within the area of the fovea (central 1 mm of the 5 mm long scan)
1 point	The sum of horizontal errors exceeds 1 mm
1 point	The sum of horizontal errors exceeds 3 mm
1 point	The sum of vertical errors exceeds 1/3 of total retinal thickness
1 point	The sum of vertical errors exceeds 1/3 of total retinal thickness

When retinal boundary detection errors were present in both the inner and outer retinal boundaries, the errors were summed to assess the severity of the axial or transverse error.