After a freak accident, student Rachel North was told she might never see again. When she suffered an epileptic fit in the shower, near-boiling water poured over her face as she lay unconscious, severely scalding her eyes. Although the sight in her right eye gradually returned, doctors feared the 19-year old's left eye was so badly damaged she would remain blind for life. But, two years on, her sight has been restored after surgeons re-grew part of her eye using groundbreaking stem cell technology.