Eli5 if stars are shaped like big giants spheres how did we get the commonly known 5 pointed star?

Question

Eli5 if stars are shaped like big giants spheres how did we get the commonly known 5 pointed star?

In: Other

Answer 1

If you have any astigmatism in your vision, it will cause single points of light to spread out into streaks and star-like shapes. This is because your cornea and lens can be slightly distorted from their perfect shape, either squashed or stretched, or even a little bumpy. These irregular surfaces don’t focus light perfectly. So you end up seeing stars, which are really tiny dots, as “burst”-like shapes that shimmer and shift around.