Blue eyes are often described as more sensitive to bright light, but the evidence reviewed does not establish this as a consistent general rule. Clinical explanations support the idea, while experimental research has found no clear relationship between iris color and discomfort thresholds.
Duke Health quotes an ophthalmologist attributing greater sensitivity in lighter eyes to lower pigmentation. However, a peer-reviewed study of 489 adults measured discomfort from glare and found no significant effect of iris color on the thresholds tested.
That experiment does not rule out every possible effect of pigmentation under different lighting conditions. Conversely, a plausible explanation does not establish how strongly eye color predicts discomfort. The claim remains uncertain as a general comparison, and sensitivity to bright light should not be confused with permanent vision damage.
Blue eyes do not reliably predict light sensitivity; the evidence for a general difference remains inconsistent.
Duke Health
Duke ophthalmologist Anupama Horne explains that lighter eye pigmentation can contribute to discomfort in bright light, while noting that brown-eyed people can also experience sensitivity.
Based on: Duke Health
Marié and colleagues
A study of 489 adults aged 20–70 found no significant effect of iris color on measured discomfort-glare thresholds. This challenges the general claim within the conditions tested.
Based on: Translational Vision Science & Technology; abstract hosted by PubMed
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