The High Court has found retail giant Woolworths negligent in failing to remove a greasy potato chip from the floor of one of its shopping centres.

As a result Kathryn Strong, an amputee who walked with the aid of crutches, fell heavily to the floor of a food court area in September 2004.

She suffered a serious spinal injury.

Ms Strong sued Woolworths in the NSW District Court, claiming its negligence caused her injury as the area was inspected more than four hours before the accident.