In this week’s Medical Discovery News column by UTMB’s David Niesel and Norbert Herzog: Like the wearable glasses-style computer called Google Glass, Google Inc. has invented another new device for your eyes — a contact lens that measures blood sugar levels in the wearer’s tears. Who needs to measure their blood sugar? The answer: The 26 million people (8.3 percent of the U.S. population) who have diabetes.