R4 series eye

My buddy needed a flat R4 eye and I could not find one. I felt that this was a good shape to start learning 3d modeling. I chose TinkerCad as a starter to learn from. I figure I will want more control in the future, and by the end I certainly did want more control. To get the sizing right I started with a program that i know really well, Illustrator. I exported a couple SVGs and had what I needed to extrude. Constructive comments are very welcome. I certainly know I have a lot to learn.