Our ability to pick out objects from their backgrounds based on differences in luminance has traditionally been thought to remain constant across different light intensities.
This assumption has been based largely on previous studies using relatively dim stimuli (Geisler et al, 2007). But researchers at the State University of New York set out to investigate how contrast sensitivity is affected in a greater range of light intensities.
In tests on cats and humans, the group measured the responses of neurons to different combinations of contrast and light intensities.
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Glaucoma is the second leading cause of irreversible sight loss in the UK and affects over one million people, which is predicted to rise by 100,000 cases to 1.145 million people by 2030*.
The College of Optometrists has published its first issue of Ophthalmic and Physiological Optics (OPO), its flagship international and interdisciplinary research journal for contemporary vision science and optometry, with its new publishing partner Springer Nature this month.