A Connecticut boy is among four children all born with severe childhood blindness who gained “life-changing improvements” to their vision after an experimental trial of gene therapy.

An experimental trial of gene therapy has helped four toddlers - born with one of the most severe forms of childhood blindness - gain "life-changing improvements" to their sight, according to doctors at Moorfields Eye Hospital in London. The rare genetic condition means the babies' vision deteriorated very rapidly from birth.

A groundbreaking gene therapy has restored sight in four young children born with severe blindness due to a rare genetic deficiency. Scientists at UCL and Moorfields Eye Hospital successfully injected healthy copies of the defective gene into the retina,

Pfizer is pulling further away from the gene therapy field with its decision to discontinue hemophilia product Beqvez. | Pfizer is pulling further away from the gene therapy field with its decision to discontinue hemophilia B product Beqvez.

Pfizer said on Thursday it will stop global development and commercialization of its hemophilia gene therapy, Beqvez, citing soft demand from patients and their doctors.