Research into the causes of blindness could be halted if funding and administrative blockages are not tackled, according to a health organisation.
The UK National Stem cell Network said scientists want to progress from research into developing treatments for vision problems but are being hindered by investment issues and legislation.
Professor Pete Coffey, from the London Project to Cure Blindness, said the lack of funding could force him to take his research to the US.
Stem cell research is a hot topic and recently a new report, Stem Cell Approaches in Neurology and Psychiatry, was published by NeuroInsights.
It details studies and development in stem cell technology for the brain and nervous system, including insights into retinal disorders.
Stem cells can be harvested from the tissue of human embryos and also fully-grown human adults.
The Department of Health states it is "making a sustained investment in stem cell research and is committed to ensuring a stable regulatory climate".
by Alexa Kaczka