North East firm PolyPhotonix has secured $10m from a US investor.
The County Durham company has created the The Noctura 400 Sleep Mask,which can be used to treat diabetic patients who are at risk of losing their sight.
PolyPhotonix’s sleep mask – designed to be worn at night – delivers a dose of light therapy while the wearer is asleep, and the treatment reduces and reverses the effects of diabetic retinopathy.