A team of doctors working with veterinarians at San Diego Zoo have carried out successful cataract surgery on a western lowland gorilla.
An eye surgeon who had operated on thousands of humans but no other type of primate performed the procedure.
Three-year-old Leslie was suffering increasing blindness in her left eye as a possible result of an injury.
Leslie, who weighs 65lb (30kg), is now back with her troop as she recovers from the surgery.
A team of ophthalmologists and anaesthesiologists from the University of California San Diego Health hospital were called to help in the zoo's first ever gorilla cataract surgery on 10 December, but it was only announced on Monday.
Source BBC