When Jarry's symptoms began, he was ranked inside the world's top 20 and on the rise, having reached the Rome Masters final, where he was beaten by Alexander Zverev.
Jarry was told it would take three weeks to recover but still has episodes a year on. Tennis is a good form of rehabilitation, given the hand-eye coordination it requires, but he has struggled for wins, falling to 143 in the world and suffering six successive first-round Grand Slam exits.
He recalled feeling like everything was "moving like a tornado" in Rome, but it quickly dissipated.
A similar feeling at the French Open before a match left him "not connecting with the ball" and "reading the game bad" before he returned home to Chile, where he experienced the worst incident to date.
Jarry also plays table tennis to help with his recovery, and a positive run at Wimbledon can only be encouraging.
Emotional on court after beating teenage talent Joao Fonseca in four sets on Friday, Jarry said: "It's amazing to put in my best performance here at Wimbledon, my favourite tournament of all."
There is a reason this tournament means so much to him.
This run to the fourth round matches that of his grandfather Jaime Fillol, who reached the same stage at Wimbledon in 1974.
"I came here with him when I was 10 and 11 years old. Since then, I'm in love with this tournament," Jarry said.
"It has been very tough physically, emotionally, psychologically.
"I have been trying to get back to my level and trusting myself again."