Related Experiment Video
Updated: Aug 11, 2026

Measuring the Behavioral Effects of Intraocular Scatter
Published on: February 18, 2021
Visual instrument image quality metrics and the effects of coma and astigmatism
1Center for Imaging Science, Rochester Institute of Technology, New York 14623.
Abstract:
We examine subjective contrast and edge sharpness discrimination in the presence of different amounts of coma, astigmatism, and combinations of these two aberrations. We also examine the correlation between subjective results and objective image quality measures. These include the integral of the modulation transfer function (MTF) across the frequency range of interest (MTFa), the Strehl ratio, the variance of the wave-front aberration, and the radius of 84% encircled energy of the point-spread function (R84). For the target orientation that is most affected by the aberrations, we find that the MTFa and R84 give good correlation, while the Strehl ratio and the variance do not. In addition, we find that the MTFa correlates with subjective results for all target orientations. We discuss the implications of the results on the automated assessment of the image quality of visual instruments.
More Related Videos
Related Concept Videos
Uncertainty in Measurement: Reading Instruments
Imaging Biological Samples with Optical Microscopy
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Focusing of Light in the Eye
Depth Perception and Spatial Vision
Sight Distance in a Vertical Curve

