Populations, in general, follow trends. Most people are similar with a few outliers on either end. For example, most people of a given age fall within a certain range of heights, but there are certainly some who are relatively shorter and others who are relatively taller. The same is true for NRR, RNFL, and GCC thickness distributions. While most people of the same age will have similar thickness profiles, some will have much thicker profiles and others will have much thinner profiles. Your OCT device color codes thickness profiles for easy identification.
- Green: 95% chance that the measured value is actually normal compared to age-matched controls.
- Yellow: The patient’s measurements are relatively thin and there is only a 5% chance that the measured value is actually normal.
- Red: The patient’s measurements are relatively thin and there is less than a 1% chance that the measured value is actually normal.
- White: The patient’s value is thicker than 95% of the age-matched control group.
CAUTION: The RNFL and GCC Thickness Maps use color coding to denote the actual measurement of the RNFL/GCC. But the RNFL and GCC Deviation Maps use color coding to denote statistical analysis for comparing the patient to age-matched controls.