Humans create images based on our perceptual perspective. When looking up at the night sky, stars appear to have many elongated points, so this shape is commonly used in drawings. And this perspective is not exclusive to humans; it extends to almost any creature with the ability to see.

Even high-powered telescopes reflect the representation of stars as spikes. This misleading phenomenon arises from the inherent behavior of light.

Light travels in ways that are consistent with both wave and particle dynamics. As a photon, it follows straight lines, while in other cases it behaves like a wave. Wave-like properties result in light waves, emitted from a distant object, being deflected or refracted slightly around an object or cavity, creating interesting patterns on the surface where they eventually fall.

This explains the sparkling, pointed effect created when light passes through a small opening, such as our eyes. But this only solves part of the mystery.

The other part has to do with an inherent flaw found in the human eye. Specifically, the fibers that make up our eye lenses intersect at certain points, creating tiny structural defects called sutures. The interaction of light with these sutures creates a distinctive star-like pattern, making them appear like pentagrams.

Diem Linh

According to Science ABC