Streiff, 59, was seen visiting Schumacher when the German was in intensive care in Grenoble Hospital, France.
Schumacher, was transferred to Lausanne Hospital, Switzerland, in June and he is now being cared for at his home on the shores of Lake Geneva.
Official news on Schumacher, who suffered a freak ski accident in the French Alps on December 29 last year, which left him brain-damaged and fighting for his life, have been scant.
Schumacher, a very competent skier, was holidaying with family and friends in Meribel, where he owns a chalet.
He was skiing with his 14-year-old son on a red piste, classed for intermediate skiers.
But shortly after 11am he left the piste and skied on to an off-piste area located in between the red run and a blue run, for beginners to intermediates.
It was here that he struck a partially-covered rock. He was not skiing fast but he lost control and catapulted 10m on to another rock.
He smashed his head on the boulder. The force of the collision shattered his helmet. The footage recorded on a camera attached to his helmet was undamaged.
The film, which included audio, captured the crash in full horror and was analysed by police who investigated the accident.
Two months later, on February 17, inquiry head Prosecutor Patrick Quincy closed the case, declaring any criminal wrongdoing had been ruled out.
Schumacher was airlifted from the slopes minutes after the accident to Moutiers Hospital and was then transferred 128km west to CHU Grenoble, a larger hospital, specialising in head injuries.
He arrived at 12.40pm and was placed in an artificial coma. He was immediately operated on to relieve pressure on his brain.
At the end of January it was announced that doctors had begun the process of gradually awakening him from his coma.
On April 4, his spokeswoman Sabine Kehm revealed that he was showing "moments of consciousness and awakening".
He had opened his eyes and had interaction, albeit minimal, with his environment.
It was the first piece of positive news for months.
Ms Kehm has said it was "very hard" for his loved ones to comprehend how the racing car driver could have been so catastrophically injured in such a "banal situation".
Today, Ms Kehm said Streiff's comments were "his opinions" and she therefore did not want to comment.
She added: "He did not have contact with us."
Schumacher's wife Corinna has been a constant presence at his bedside. She and Schumacher met in 1991 on the F1 circuit after she was previously married to racing driver Heinz-Harald Frentzen.
She once said: "Michael's passion for racing is just huge, it would have been impossible without this deep passion; this passion has made him who he is. I got to know him as a racer, and I had previously always had fullest confidence in him."
