Justin Langer has said that "mental scars" could be a problem for Australia opening batsman Chris Rogers after a dizzy spell forced him to retire during the second Test of the current Ashes series.

The 37-year-old managed just two overs at the crease on the fourth day at Lord's, with the team suggesting that the episode may have been a delayed reaction to being struck by a bouncer on the first day of the match.

Langer, who played 105 Tests for Australia before retiring in 2007, told Sky Sports News: "I think the biggest symptom is, and this may sound silly, but getting back on the horse to face fast bowling again.

"There's the psychological trauma as much as the physical trauma. Ultimately you can get over the physical side, but it's the mental scars of having to face fast bowling again and having that horrible feeling of going blank for a shot having been hit.

"It only lasts for a few seconds, but when it does happen it is a horrible feeling. He is battling unbelievably well and just scored an incredible Test match hundred. He is in the form of his life, but it will always be a battle for him for the rest of his career having to take on the fast bowlers again."

Rogers has announced that he plans to retire from Test cricket at the end of the Ashes series.