The article says, "In two other studies, the level of beta-amyloid detected in the eye (a) was significantly correlated with the burden of beta-amyloid in the brain and (b) allowed researchers to accurately identify the people with Alzheimer's in the studies."
It's states that the importance of these tests lies with early detection, because it can lead to a quicker intervention and prevention. The article indicates that in current time, most cases can not be found until they are in the late stages when significant damage has already been done. Discovering ways to catch it in the early stage could significantly change the outcome of people who are diagnosed with Alzheimer's.
Science Daily states in the article, "Recent studies have identified beta-amyloid plaques in the retinas of people with Alzheimer's -- similar to those found in the brain -- suggesting the possibility of simple, non-invasive methods of early detection."
This could be great news for our future medical advancements. Take the time to read the entire article!