In the middle of his round robin match against Rafa Nadal at the ATP World Tour Finals at the O2 Arena in London, Novak Djokovic had trouble with his contact lenses. Djokovic took a timeout and tried to resolve the problem with help from a trainer but when that did not work, Djokovic ran off the court to the locker room to get another pair of contacts. Unfortunately, the contacts clearly bothered Djokovic for the rest of the match which he lost in straight sets and highlighted how important it is for sports participants to make the right sports vision correction   choice. 

Djokovic, who complained about the irritation early in the first set and was still uncomfortable at the end, rarely hit a rhythm against the world No1. Long after the match, he was still at a loss to know exactly what had caused the discomfort. "I really feel sick talking about it, to be honest," Djokovic said. "It has never happened to me before. My right eye got irritated, and from the five-all I could not play. I could not see a ball, especially the return. It was just terrible," he explained.

"You get on the court and this thing happens to your eye, the most important thing for your body, coordination, sight, everything you can think of," said Djokovic. "I needed some time to make it right, but I didn't have time. Everybody was hurrying me up: Three minutes, 30 seconds, come to the court, play your match, whatever. You know, I just don't have time for that." It is clearly impossible to play high-level tennis when you cannot see perfectly - especially when your opponent is someone like Nadal - so players have to be sure their sports vision correction  choice will not lead to problems.

Off court, Djokovic often wears glasses and seems comfortable with this option away from the rigours of top class competitive tennis. However, glasses would be an impractical option for him on court given that the majority of tournaments are played outdoors where weather factors can be a problem along with the risk that he loses his glasses during a physically demanding rally. Laser surgery could be another option but many high level sports participants worry that their vision may not be absolutely perfect after the procedure.

Hence Djokovic - like many of his fellow tennis professionals - uses conventional daytime contact lenses for training and playing. However, overnight corrective contact lenses are another choice of sports vision correction  which would have helped Djokovic avoid the problems he encountered against Nadal. These night contact lenses are only worn while sleeping then removed in the morning to provide clear natural vision all day long. For all sports participants, they offer an excellent alternative to glasses, daytime contact lenses and laser surgery.