We spend countless hours glued to our phone screens, and screen brightness keeps increasing. The iPhone 15 boasts a peak brightness of 2,000 nits, significantly higher than the iPhone 14's 1,200 nits. While not constantly at this intense level, the trend of brighter displays is undeniable.
Although a direct link between screen time and permanent eye damage remains unproven, studies are showing a correlation between excessive phone use and eye strain. Protecting your eyesight is paramount. The impact varies from person to person.
Beyond simply reducing phone usage, built-in tools can mitigate the negative effects of prolonged screen time. Both iOS and Android devices offer blue light reduction features (Night Shift on iOS, Night Light on Android) to minimize sleep disruption. However, this article focuses on another valuable tool: Screen Distance.
Screen Distance is a new feature in iOS 17 (and iPadOS 17), so ensure your device is updated.
How Screen Distance Works
Screen Distance aims to prevent holding your phone too close to your eyes. Research suggests a link between smart device use and myopia, and this feature helps reduce that risk, along with general eye strain.
Utilizing the TrueDepth camera (found on most iPhones since the iPhone XR, XS, and XS Max, excluding the iPhone SE), the feature measures the distance between your eyes and the screen.
An alert appears if the phone is held closer than 12 inches (approximately 30 centimeters) for an extended period.
Using Screen Distance
Screen Distance isn't enabled by default in iOS 17. To activate it, open your iPhone's Settings app, then navigate to the Screen Time menu. This menu also manages app time limits and other restrictions.
Tap on "Screen Distance." The iPhone will guide you through an initial setup explaining the feature. Once enabled, a toggle switch allows you to turn it on or off. Note that Screen Distance is automatically enabled for children under 13 in Family Sharing groups.
With Screen Distance active, your iPhone functions normally until held too close for several minutes. An "iPhone is Too Close" message then appears, prompting you to move the phone further away before resuming use.
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