PPD Explained: Why It Matters More Than 4K in VR/AR 2025

PPD = Pixels Per Degree

The single most important number for VR/AR sharpness

1. It tells you how many pixels cover 1 degree of your vision
2. Higher PPD = crisper text, no visible pixel grid, less eye strain
3. Lower PPD = soft image, obvious screen-door effect

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Why PPD > Raw Resolution

1. A 4K headset with super wide FOV can have lower PPD than a 3K headset with narrow FOV
2. PPD is what your eyes actually feel, not marketing resolution numbers

Current PPD Rankings (November 2025)

20 to 27 PPD – Budget Tier

1. Quest 2 → ~20 PPD
2. Quest 3 / Quest 3S → 25 to 27 PPD (gaming OK, text tiring)

35 to 45 PPD – Mid/High-End PCVR

1. Pimax Crystal Light → ~38 PPD
2. Bigscreen Beyond → ~42 PPD

50 to 59 PPD – Premium Tier

1. Apple Vision Pro Gen 1 → 54 PPD
2. Xreal One AR glasses → ~50 PPD
3. Pimax Dream Air 2025 → ~58 PPD

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60+ PPD to Retina Class

1. Apple Vision Pro Gen 2 → 62 to 64 PPD
2. Varjo XR-4 Focal → 68 PPD (world record)
3. Samsung Project Moohan exp. → 60 to 63 PPD
4. Meta Quest 4 leaked → 55 to 60 PPD + foveated boost

Human Eye Limits

1. Average person (20/20 vision) → ~60 PPD in center
2. Perfect vision (20/10) → ~70 to 75 PPD
3. Below 30 PPD → pixels very obvious
4. 45 to 55 PPD → comfortable for work
5. 60+ PPD → “I forgot I’m in VR” moment

How to Calculate PPD Yourself

Horizontal PPD = (horizontal pixels per eye × 2) ÷ horizontal FOV in degrees

Examples

1. Quest 3 → (2208 × 2) ÷ 110° ≈ 25 PPD
2. Vision Pro Gen 2 → (4032 × 2) ÷ 110° ≈ 73 PPD (Apple quotes 62 after lens correction)
3. Varjo XR-4 → (3840 × 2) ÷ 120° ≈ 68 PPD

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What Different PPD Levels Actually Feel Like

20 PPD

1. Reading hurts after 10 minutes
2. Screen door everywhere

30 to 40 PPD

1. Great for gaming
2. Text workable but not relaxing

45 to 55 PPD

1. Comfortable 3 to 4 hour sessions
2. Movies and productivity feel natural

60+ PPD

1. You can read books all day
2. Many people literally forget they are wearing a headset

Future PPD Roadmap

2026

1. Eye-tracked foveated rendering → effective 80 to 100 PPD while saving power

2027 to 2028

1. Micro-lens arrays → +20 to 30 PPD boost
2. Direct-RGB micro-OLED → room for even higher resolution

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Quick Buying Guide Based Only on PPD

1. Just gaming & fun today → Quest 3 (25 PPD) is fine
2. Want to work / watch movies → minimum 50 PPD (Vision Pro or wait)
3. Want true retina right now → Vision Pro Gen 2 or Varjo (62 to 68 PPD)
4. Best balance coming 2026 → Quest 4 or Samsung Moohan (55 to 63 PPD + foveated)