Gene editing has been used to fix broken retinal cells in a laboratory setting.

Researchers hope it will pave the way for a treatment for the most common form of inherited blindness.

The discovery was made possible by a breakthrough in understanding the genetic mutations which cause retinitis pigmentosa.

The researchers, from the Universities of Leeds and Newcastle, found that mistakes in “proofreading” the genetic code of retinal cells cause mutations which lead to the disease.

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