A Melbourne tram driver who was spotted driving with the windscreen blind pulled almost all the way down in Melbourne's east has been investigated before for his "unsual" driving style.

Yarra Trams spokeswoman Melanie Lim - commenting after a passenger photographed the driver in action last Friday - said the company is "aware of the driving style of this driver and has previously investigated the safety of his driving".

Maria Lindsey, who was travelling on a tram from North Balwyn to the city at 7.15am last Friday, photographed the driver hunched over the controls and apparently struggling to see out through the gap at the bottom of the window.

“There was 10 to 12 centimetres of which he could see through, max,” Ms Lindsey told radio station 3AW.

“It was the most ridiculous thing.”