Is the OCT better, worse or the same?

69-year-old man with Wet Age Related Macular Degeneration who is stable on quarterly anti-VEGF intravitreal injections presents for a routine follow-up evaluation. The change map demonstrates a subtle decrease in retinal thickness and there is an absence of visible subretinal fluid. This represents an improvement from the prior examination. However, note that if you only saw the patient at the second time point it would be a mistake to think he does not warrant close follow-up/therapy. Fluid free intervals are the goal but can be confusing to the general practitioner that does not perform the injections and does not have the perspective of change over time and response to therapy over time.