Water is transaparent;glass is transperent;when water falls on glass why we cant see?

The light still comes through because both water and glass are transluscent, but there’s two reasons why seeing clearly is difficult.

1) Light travels through water and glass at different speeds, and so get bent when it transitions between them.
2) If the water hits the window and sticks like a droplet, it acts like a lense or a sort of prism and also bends the light.

The more the light gets bent, the more distorted the image gets, and the harder it becomes to make sense of it, i.e to “see clearly.”