iOS includes a health and safety feature known as ‘Screen Distance’, designed to reduce eye strain and the risk of myopia in children by alerting users when they hold their iPhone or iPad too close to their face. The feature leverages the TrueDepth camera system (the same infrared hardware used for Face ID) to continuously calculate the physical distance between the screen and the user’s eyes. While well-intentioned for personal well-being, Screen Distance introduces an operational security (OPSEC) liability in environments where continuous infrared (IR) biometric scanning is prohibited, or on provisioned corporate devices where the TrueDepth camera’s constant polling drains battery and processes sensitive biometric geometry data unnecessarily.
This guide explains how to completely disable the ‘Screen Distance’ feature system-wide on an iPhone, ensuring the TrueDepth IR camera is not continuously polling for facial proximity and eliminating the associated intrusive on-screen warnings.
Disable the Screen Distance Feature
Screen Distance operates as a sub-component of the Screen Time framework, even if core Screen Time restrictions are not actively enforced. To guarantee the TrueDepth camera is not utilised for this background polling, we must explicitly toggle the feature off.
- Unlock the provisioned iPhone and open the main Settings app.
- Scroll down and tap on Screen Time.
- Locate the section labelled Screen Distance (it is typically found under the core Screen Time metrics).
- Tap on Screen Distance. You may be prompted to enter your Screen Time passcode if one has been administratively set.
- Toggle the main Screen Distance switch to the Off (grey) position. (By explicitly disabling this, you instruct the iOS biometric daemon to cease polling the TrueDepth camera for proximity calculations, immediately terminating the IR scanning loop used for this specific feature).
Verify the Configuration Lockdown
Changes to the Screen Distance toggle are applied immediately, halting the background biometric proximity polling process.
To verify the restriction is active, return to the main Screen Time menu and ensure the “Screen Distance” option explicitly displays as “Off”. Furthermore, use the device normally and deliberately hold it extremely close to your face (under 12 inches) for several minutes. The intrusive, full-screen “iPhone is Too Close” warning shield will no longer appear, confirming that the TrueDepth camera has ceased monitoring your physical proximity for eye strain analysis. The device’s biometric OPSEC profile is now strictly controlled.