At this year's Alzheimer's Association International Conference, researchers reported that a dilated fundus examination can aid in the detection of Alzheimer's.  The study found a high correlation between patients diagnosed with Alzheimer's or "pre-Alzheimer's" and changes in the blood vessels when viewed with retinal photography or via live fundus examination.  Thinning of retinal vessels (arterioles and venules) was noted, as well as a narrowed arteriole...