FIG 3 (IMAGE) Compuscript Ltd Caption Reproduced results of USAF-1951 resolution test chart at different viewing positions in the circumferential direction. (a) Images taken at 0°, 40°, 90°, and 130°. (b) Images taken at 180°, 220°, 270°, and 310°. Credit OEA Usage Restrictions Credit must be given to the creator. License CC BY 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.