“This video shows what it’s like to have astigmatism from a first-person view in virtual reality. I also built a custom control panel that allows you to change the strength and direction of the distortion, so this should give you a good idea of what having this deficit would feel like and how changes in the strength and direction would affect your vision.”
See also: https://www.youtube.com/watch?v=B1Bi3i-zFH4