Jason Smyth won his eighth World Championship title in Dubai on Wednesday.
The 32-year-old Derryman claimed gold in the T13 100m final in a championship record of 10.54 ahead of Australia's Chad Perris in second and Namibia's Johannes Nambala in third.
Perris ran 10.86 while Nambala clocked 10.98.
The run was just 0.08 outside his own world record and 0.03 slower than his season's best.
Smyth, who is legally blind, is a five-time Paralympic sprint gold medallist. He took the 100m and 200m double at the 2008 and 2012 Games along with 100m gold in Rio.
Smyth is also Ireland's second fastest man over 100m. His personal best of 10.22, set eight-and-a-half years ago, is just 0.04 shy of Paul Hession's Irish record.
Smyth's gold is Ireland's second medal of the championships. On Tuesday, Cork woman Niamh McCarthy claimed bronze in the F41 discus throwing 29.70m as she finished behind Morocco's Youssra Karim in second and winner Raoua Tlili of Tunisia.
Photo by Ben Booth/Sportsfile