How we classify celebrities’ eye colour
Three approaches — the classic Martin–Schultz (primary), Fitzpatrick-based (contextual) and commercial automated methods.The Original Martin–Schultz (primary)
A classical anthropological scale with fine-grained categories (from very light blue to very dark brown). We use it when a reproducible, detailed classification is needed.- Choose high-quality, ungraded photos.
- Assess iris structure (central ring, spots, sectors).
- Match the closest scale category and record modifiers (central/sectoral heterochromia, uncertainty).
More about this scaleFitzpatrick-based (context)
Provides skin-phototype context linked to pigmentation; useful in clinical or aesthetic descriptions but does not replace an iris colour chart.More about this scaleCommercial / Automated methods
Computer vision and machine learning offer fast, quantitative classification for large datasets, but depend on training data and image preprocessing.About commercial scale