"The human eye long ago solved a problem common to both digital and film cameras: how to get good contrast in an image while also capturing faint detail," starts the post on MedicalNewsToday. "Nearly 50 years ago, physiologists described the retina's tricks for improving contrast and sharpening edges, but new experiments by neurobiologists at University of California, Berkeley and the University of Nebraska Medical Center in Omaha show how the eye achieves this without sacrificing shadow detail. These details will be published tomorrow in the online, open access journal PLoS Biology."
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