Comprehensive Detection, Grading, and Growth Behavior Evaluation of Subthreshold and Low Intensity Photocoagulation Lesions by Optical Coherence Tomographic and Infrared Image Analysis

Figure 3

showing the clinical appearance of the lesions from Figure 2 at identical time points (before the treatment, 1 hour, 1 month, and 3 and 6 months after the treatment). Columns compare images of the same lesion over time, and rows compare lesions of different OCT classes at identical time points. Every cell in the composite figure contains a fundus colour image (top), an AF image (middle), and an IR image (bottom). The lesions are centred in all single images. In the top row, we show for each lesion the parameters exposure-time in ms, peak end temperature at the level of the RPE in °C, and power in mW. In the second row (1 hour), the lesion area as measured in the colour image is given in mm², and in all consecutive rows (1–6 months), the lesion area as measured in IR images is given in mm². The irradiated area of 300 μm lesions is 0.071 mm². *In the 1 hour class 2 fundus colour image, the lesion site is superimposed by an optical reflex, but the lesion itself is ophthalmoscopically invisible (see also Figure 1). n. a.: image not available.