Figure 4.

Example of how survival probabilities can be updated as more information on predictive factors becomes available during follow-up. (A) Left: shows survival probabilities after considering only the baseline data. The model estimated that the probability of retaining a normal visual field and stable optic disc over time was relatively high. As more information became available (middle and right), the survival probabilities were updated. The estimated survival probabilities became much lower as the result of progressive losses in estimated RGC number over time. (B) Baseline optic disc photograph and visual field (grayscale and pattern deviation plot) results from the same eye shown in (A). (C) Optic disc photograph from the same eye showing progressive neuroretinal rim thinning during follow-up. The visual field shows evidence of abnormality as indicated by the pattern standard deviation (PSD) outside normal limits.