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Simulate pterygium fibrovascular corneal growth across early nasal, advanced visual-axis, and post-surgical recurrence stages. Tune severity to explore UV-induced irregular astigmatism, corneal scatter and contrast reduction. Inspect ΔE & chromatic shift from tissue opacity and distortion.

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Base color
Growth stage & settings
Growth severity100%
Image simulation
Upload JPG/PNG (max 1200×1200). Simulated canvas next to original.
Research notes
Pterygium is a fibrovascular wing-shaped growth of conjunctival tissue that invades the cornea from the limbus, predominantly nasally. UV-B radiation is the primary driver of limbal stem cell dysfunction and subepithelial fibrovascular proliferation. Early stages cause mild irregular astigmatism from corneal distortion at the growth head; advanced stages threaten the visual axis and significantly reduce acuity from scatter and irregular astigmatism. Severity maps to growth-head extension beyond limbus (mm) and corneal involvement grade (T1–T3 morphological grading).
Swatches — Reference vs Pterygium
Reference
HEX: — • RGB: — • xy: —
Simulated
HEX: — • RGB: — • xy: —
ΔE (CIE76)
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ΔE (CIEDE2000)
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Deep preview
Reference
Simulated
Chromaticity (CIE xy)
Corneal scatter axis (toward D65 white)
D65 white point: 0.313, 0.329
Image simulation

Simulations operate in linear sRGB. Early-nasal mode applies mild asymmetric blur and slight scatter from limbal tissue; advanced mode increases scatter, contrast reduction and astigmatic distortion; post-surgical recurrence mode models residual fibrovascular haze. ΔE2000 measures perceptual colour shift from tissue scatter whitening and contrast loss.

Multi-condition comparison
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Compare normal, Condition A and Condition B across multiple severities. If an image is loaded it will be processed into the grid, otherwise colour swatches are shown.