The problem is that most monitor makers control brightness by lowering this flicker rate (the so-called pulse width modulation).Īnd the worse it is for our eyes, the lower the frequency. There is no way to make a monitor without this flicker, and this is not the real problem. Most of the time, this flicker happens so fast that we don’t notice it. When your monitor is on, it is always flickering. This is the same as f.lux, CareUEyes, Night Shift, and other software that blocks blue light. At night, blue light stops the hormone melatonin from being made, which is what helps us sleep.ĭepending on where you are, Iris makes your screen a little more yellow or red at night, depending on the color temperature. Think of color temperature as making the screen give off less blue light.

It can change the color temperature of the screen and lower the brightness of the screen without making the monitor flicker faster (the so-called PWM problem). With this app, you can reduce the amount of blue light your screen gives off so you can sleep better, lower the brightness of your screen without PWM, and keep your eyes from hurting. Iris Pro is a hand tool that makes monitors and computer screens easier on the eyes.

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