>>11970404>The lights have similar shapesWhen a point light source is out of focus it will take the same shape as the aperture.
>there are little dots on themThose are dust particles on the lens that are diffracting light and creating airy patterns.
You can see this effect using your very own eyes by putting aluminum foil over a flash light and poking a tiny hole in the foil and then placing the flash light close to one of your eyes. Eye floaters will become really visible with diffraction patterns around them. You can also squint with your eye a little bit and make your eyelashes visible which will also show diffraction patterns around the edges. It's really cool.
This video explains how to do it in more detail and also shows what you can see.
https://www.youtube.com/watch?v=xZVd5JaU9tk 
