University of Sussex Professor of Neuroscience, Tom Baden, explained that zebrafish are good models for understanding how the human eye might work because the fish have an acute zone within their eyes which is an “evolutionary forerunner to the fovea.”

"We found that, in this acute zone, zebrafish are using single photoreceptors to spot their tiny prey – the equivalent of us spotting a star in the sky,” he said.

"There have been suggestions that primates and therefore humans too, use similar tricks to enhance our own foveal vision," Professor Baden added.

Future research possibilities include manipulating visual functions in the zebra fish acute zone to see how this affects their sight.