Application of Spectral Domain Optical Coherence Tomography to Objectively Evaluate Posterior Capsular Opacity In Vivo

Figure 2

Illustration graph of the PCO evaluation method RTVue-100 OCT (the figure was acquired at the horizontal meridian from the same eye as in Figure 1). Measurement of PCO characteristics in one cross-sectional image. S: surface. Point A is the centre of the line (green line) that passed the horizontal or vertical centre of the IOL, which is the centre of the IOL optic region. Distance between points B and C is defined as the 3 mm diameter range of the IOL optic region (yellow arrow line), while the red line between points D and E is the 5 mm range (red arrow line). S1 is the anterior surface of the IOL, S2 is the posterior surface of the IOL, and S3 is the posterior capsule. The crescent-shaped space between S3 and S2 is the IOL-posterior capsular space, which is the space over the full 6 mm diameter. The lengths of L1, L2, L3, L4, and L5 are PCO thicknesses at the point of the central optic region and at the 3 mm and 5 mm diameter of the IOL optic region. The area between L3, L2, S2, and S1 is the PCO region at the 3 mm diameter range of the IOL optic region (indicated with a yellow line), while the area between L4, L5, S2, and S3 is the PCO region at the 5 mm diameter range of the IOL optic region (indicated with a red line).