CET and skills guides

Study and gain CET points through OT’s online CET exams, and access archived CET, CPD articles and skills guides in our education library

Find out more

Science and vision

News and features about the latest scientific developments and advances in optometry, ophthalmology and eye medicine

Find out more


News and features about the latest developments in optics with a focus on industry

Find out more

Professional support

News and features about the latest developments relating to professional support from across optics. This includes updates from optical organisations such as the AOP and the GOC

Find out more

In practice

News and in-depth features about business management and career development in optics

Find out more


Explore the latest UK and global jobs in the optical sector for optometrists, dispensing opticians and more

Find out more

Small scale: scientists study fish for clues about how humans spot tiny details

The ‘single-pixel’ vision of fish could help scientists to understand how humans identify small stimuli in their environment

fish eye
New research published in Neuron has investigated how zebrafish use a single photoreceptor to spot their prey.

University of Sussex scientists found that zebrafish larvae may use single UV cones at a time to detect the UV-bright microorganisms that they feed on.

The study provides insight into how humans identify small details in their surrounding environment.

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.