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Study Reveals Eye Can See Up to 120 Pixels Per Degree

11/6/2025

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Summary

Story summary

Researchers from the University of Cambridge and Meta challenge the belief that the eye's maximum resolution is 60 pixels per degree.
Foveal vision can reach 94 pixels per degree (PPD) for black-and-white patterns, 89 PPD for red-green, and 53 PPD for yellow-violet.
Some participants reached 120 PPD.
The study questions the effectiveness of chroma subsampling, noting that resolution limits vary by color direction.

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Story summary

Researchers from the University of Cambridge and Meta challenge the belief that the eye's maximum resolution is 60 pixels per degree.
Foveal vision can reach 94 pixels per degree (PPD) for black-and-white patterns, 89 PPD for red-green, and 53 PPD for yellow-violet.
Some participants reached 120 PPD.
The study questions the effectiveness of chroma subsampling, noting that resolution limits vary by color direction.