Ophthalmoscope calibration (IMAGE) Indiana University Caption Marcelina Sobczak, a postdoctoral researcher at the School of Optometry, prepares the ophthalmoscope for use. Credit Photo by Chris Meyer, Indiana University Usage Restrictions Credit source 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.