Jason Smyth and Michael McKillop say they will aim for more success at Tokyo 2020 as Ireland's Paralympic team were given a heroes' homecoming welcome in Dublin.
"I've been in this sport for 11 years and never been beaten," said Smyth, who won the fifth Paralympics gold of his career in Rio as he defended his T13 100m title.
"It would be incredible to go a fourth consecutive Paralympics Games and win gold.
"If I could go through my entire Paralympics career unbeaten, that for me would be a pretty impressive achievement," added the 29-year-old Eglinton man.
Glengormley athlete McKillop, 26, said he planned to finish his Paralympic career in Tokyo with another gold.
McKillop successfully defended his T37 1500m title in Rio as he clinched a fourth Paralympic gold medal.