Welcome to the Visual Systems Lab.
Each program was built from first principles to explore a question that lacked a satisfying explanation. Some are for patients. Others are intentionally technical. When something does not make sense, it gets modeled and tested.
Educational use only. Not a substitute for an eye exam.
Yes, it is cool to see this on the retro screen. But to truly appreciate this tool, open it in high resolution, the way it was designed.