- We also know that those other important signs looking at cholesterol levels, looking at particularly hypertension, blood pressure levels. Looking at those types of feelings that we've always known for prevention of stroke. We need to keep those up as well. What retinopathy is doing is one additional thing. It's not substituting for, we wouldn't say, well I got retinopathy test and so therefore I'm not going to take my blood pressure medication. We want to keep emphasizing the importance of maintaining the other known risk factors as well and recognize that retinopathy is an additional risk factor that we would want to consider.