CPD and Education library

Study and gain CPD points through OT’s online CPD exams, and access archived CPD and CET articles, Practice team resources 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

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

OCTA could be used to reveal signs of early cognitive impairment

Vascular changes linked to a precursor to Alzheimer’s can be identified using optical coherence tomography angiography


New research suggests that optical coherence tomography angiography (OCTA) could be used to detect signs of early cognitive impairment.

The study, which was published in PLOS One, found that in patients with a precursor to Alzheimer’s disease there is decreased superficial parafoveal vessel density and blood flow.

Previous research has shown that there are changes in retinal blood flow and vessel density in patients with Alzheimer’s but it was not known whether these changes could also be observed in people with early forms of the disease.

The study group of 32 participants included 16 patients with early Alzheimer’s disease or a forgetful type of mild cognitive impairment. The other 16 participants were cognitively normal controls.

OCTA scans were taken and analysed across a range of vascular and structural parameters.

“Overall, the correlation between vascular OCTA parameters and cognitive performance supports further OCTA studies in this population,” the authors emphasised. 

Image credit: Petr Novák, Wikipedia