What Affects Our Perception of High Refresh Rates on Monitors?

Persistence of vision is the reason we perceive motion. Our brain combines still images shown in rapid succession to create the appearance of smooth movement. However, there’s a threshold beyond which the difference becomes almost imperceptible, and this varies from person to person.

Ultimately, it's mostly about biology. The human eye and brain reach a point where they can't process frames quickly enough to notice a difference. I personally switched from 144Hz to 240Hz, and honestly, it hardly felt like a leap compared to the jump from 60Hz to 144Hz.

After hitting around 144Hz, the returns begin to diminish. Plus, let's be honest, most average gaming PCs struggle to hit 240 FPS on many newer titles, which makes this discussion even more relevant. It's less about what's physically possible and more about the limitations of the hardware.

Our eyes are pretty much like complex analog cameras. They use a process called phototransduction to turn light into electrical signals that our brain can interpret. However, these chemical reactions in our eyes can only occur at a certain speed, limiting how quickly we can process different images on the screen.

A lot of enthusiasts might not have experienced controlled tests to see if they can actually tell the difference in refresh rates. For instance, Linus Tech Tips conducted an interesting test where players could differentiate refresh rates up to around 240Hz to 300Hz, which even improved their gameplay. It's fascinating how the speed of our eyes and how they perceive flashes can affect what we see on screen!