Table 1.

Vitreous opacities severity scale.

Grade 0—No vitreous opacities visible (Figure 1 and Video S1).

Grade 1—Diffuse opacities that do not cross the center of the macula (Figure 2 and Video S2).

Grade 2—Diffuse opacities that cross the center of the macula (Figure 3 and Video S3) and/or dense opacities that do not cross the center of the macula (Figure 4 and Video S4).

Grade 3—Dense opacities outside the center of the macula in primary gaze, that cross the center of the macula with eye movement (Figure 5 and Video S5).

Grade 4—Dense opacities that involve the center of the macula in the primary gaze (Figure 6 and Video S6).

Grade 5—Dense opacities that obstruct at least 30% of the macula (~2 disc diameters in size) (Figure 7 and Video S7).