Looking at aimpoint red dot sights, all of them seem to use a red dot circle. ???

Who makes a similar but uses a triangle or an open ended arrow type lit sight, inverted V?

My eyes show a dot as starry. Some other "dots" do not.

Also a small dot is required for accuracy. But is too small for quick shooting. A big dot is fast but not accurate.

Solution is an open arrow inverted V , or a solid triangle. Big. Quick shooting. The point of the triangle or inverted V, allows accurate shooting