# What is the PWM flickering rate on iPhone 17 Pro Max display and does it cause eye strain?

> Expert answer about the Apple iPhone 17 Pro Max

*Published: 2026-02-26 | Updated: 2026-02-26 | Source: https://shopsavvy.com/answers/what-is-the-pwm-flickering-rate-on-iphone-17-pro-max-display-and-does-it-cause-eye-strain*

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## Product: Apple iPhone 17 Pro Max (512 GB) - Deep Blue [6.9-inch Display with Promotion, A19 Pro Chip, Best Battery Life in Any iPhone Ever, Pro Fusion Camera System, Center Stage Front Camera]
**Brand:** Apple

The iPhone 17 Pro Max uses 480Hz PWM for brightness control. For most people, irrelevant. For some, it causes real problems.

**What's happening:**

PWM controls brightness by rapidly turning pixels on and off. At lower brightness, more time in "off" state. Your eyes might not consciously see flicker, but some bodies react anyway.

**The symptoms:**

Eye strain. Headaches. Fatigue after extended use. Usually worse at low brightness, like in bed at night.

**Am I affected?**

If you've had issues with other OLED phones or certain monitors, you might be sensitive. If you've never noticed screen problems, probably fine.

**How iPhone compares:**

Samsung S25 Ultra: same 480Hz. Honor Magic 7 Pro: 3840Hz. Higher frequency = fewer issues for sensitive people.

**What to try:**

Keep brightness higher. PWM less noticeable at higher levels. Enable True Tone. Use "Reduce White Point" in accessibility. Take breaks with the 20-20-20 rule.

**Before buying:**

If you suspect PWM sensitivity, test the phone in an Apple Store at low brightness for 15-20 minutes.

[Compare iPhone 17 Pro Max prices](https://shopsavvy.com/products/5fd8976f-1f7a-f47f-66c8-bc718ad63f3e) across retailers.

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*Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from thousands of retailers, and analysis of user reviews to give you a well-rounded picture.*