Article continues below advertisementIan Gillan, the frontman of Deep Purple, has revealed he is losing his eyesight and warns retirement may be "not far off," prompting grief in the rock world just months after the death of his friend Ozzy Osbourne.OK! can reveal Gillan, who turned 80 in August, made the admission in a new interview, disclosing he now has just 30 percent vision and fears his performance days may be numbered.Deep Purple, who last completed a full run of shows in November 2024, recently completed a one-off concert in Tbilisi, Ga.