Receive $80 Grab vouchers valid for use on all Grab services except GrabHitch and GrabShuttle when you subscribe to BT All-Digital at only $0.99*/month.
Find out more at btsub.sg/promo
THE eyeglass lenses that Don McPherson invented were meant for surgeons. But through serendipity, he found an entirely different use for them: as a possible treatment for colour blindness.
Mr McPherson is a glass scientist and an avid Ultimate Frisbee player. He discovered