Usually, the eye is round, like a tennis ball. Astigmatism is a form of refractive error, which means the eye does not refract or bend light correctly. Someone with mild astigmatism may not notice ...

Also, lights at night may streak out from the source, with annoying streamers appearing around oncoming headlights or ...

[1] The asymmetry means that light is focused differently between the 2 meridians. As a result, the image does not focus at a single point. Patients experience astigmatism as blurring of vision ...