A closer look
Human eye is often voted as one of evolution’s masterpieces, but here’s the twist—it’s actually full of flaws. We see upside down at first; our brain spends energy flipping the image. Blood vessels lie across our retinas like badly placed wires, creating a small blind spot in each eye. Why keep such imperfections? Because evolution doesn’t design; it tinkers. It adapts existing parts over millions of years rather than starting fresh. The octopus eye, by contrast, has no blind spot because its nerve wiring evolved differently. Our imperfect eyes are a living fossil of evolutionary improvisation—a reminder that what works doesn’t always mean it’s optimal. Next time you notice a visual illusion tricking you, smile: it’s your messy evolutionary history playing peekaboo with your brain.
