Marcus Grönholm testaa kaihisimulaatiota ajaessa (Teknavi 2025)

Vision is one of the most important safety features in traffic. In this episode of Teknavi, we explore how cataracts can affect driving and why deteriorating eyesight can easily go unnoticed. Teknavi travelled to Inkoo to visit Marcus Grönholm’s estate, where the two-time World Rally Champion tested driving while wearing cataract simulation glasses. The test demonstrated in a concrete way how blurred vision, glare and weakened night vision can make driving significantly more difficult. In the episode, Ulla Näpänkangas, CEO of Silmäasema Sairaala Oy, explains how to recognize the early symptoms of cataracts, why good eyesight at an optician does not always mean good vision in real traffic situations, and why cataracts cannot be corrected with glasses alone. Journalist Satu Tuomisto also tests what driving feels like while wearing cataract simulation glasses.