Department of Physics Papers

Document Type

Journal Article

Date of this Version

4-2016

Embargo Date

April 2017

Publication Source

Physical Biology

Volume

13

Issue

2

DOI

10.1088/1478-3975/13/2/025001

Abstract

It is sometimes said that 'our eyes can see single photons'. This article begins by finding a more precise version of that claim and reviewing evidence gathered for it up to around 1985 in two distinct realms, those of human psychophysics and single-cell physiology. Finding a single framework that accommodates both kinds of result is then a nontrivial challenge, and one that sets severe quantitative constraints on any model of dim-light visual processing. This article presents one such model and compares it to a recent experiment.

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Date Posted: 15 March 2017

This document has been peer reviewed.