First time point with lattice (IMAGE) Northwestern University Caption Using cutting-edge techniques, Northwestern University researchers are the first to visualize how a mechanical wave at the eye epithelium (grey) causes cells to develop into the hexagonal pattern (red) of the fruit fly eye. Credit Northwestern University Usage Restrictions No restrictions License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.