As someone with shortsightedness of the order of nearly 20/200, this visual effect is accurate for the distances of blurriness. I am real life Velma, who without glasses everything is somewhat blurry beyond even a foot from me, maybe not to the excessive blurriness that they suggest Velma has or that video, I can still recognize shapes I am familiar with me (like my glasses), but once you get to a certain point of shortsightedness, reading something I hold in my outstretched hands can be impossible lol.