What may be the effect if you use damaged or worn wiper blades in a passenger car?

Using worn windscreen wipers results in the windscreen not being cleaned properly, which leads to smears and reflections, drastically limiting visibility. This is particularly dangerous in difficult conditions, such as rain or at dusk, as it makes it harder to spot obstacles on the road. Functioning windscreen wipers are a fundamental safety feature and a condition for the vehicle to be permitted on the road.