Base color
Rod simulation mode
Image simulation
Research notes
Rod Monochromacy: rods dominate vision while cones do not
contribute to chromatic perception. Vision is essentially grayscale,
dimmer, and lower acuity. Strict mode maps directly to luminance
Y; blue-tinge adds a small S-axis bias for perceptual matching;
enhanced preserves local contrast for demo visibility (not
research-strict).
Swatches — Reference vs Rod-mono
Reference
HEX: — • RGB: — • xy: —
Rod-mono
HEX: — • RGB: — • xy: —
ΔE76
—
ΔE2000
—
Deep preview
Reference
Simulated
Chromaticity (CIE xy)
Rod-axis target (approx)
Rod-axis:
0.310, 0.330
Image simulation
Original
Rod simulated
Multi-condition comparison
5
Clinical notes: Rod monochromacy weights reflect cone suppression (L=0, M=0, S=0)
with pure rod luminance. Adjusting weights allows exploration of partial cone-rod hybrid models.
Not a clinical diagnostic — see model assumptions for limits.
Model assumptions & limits
- Strict mode maps directly to Rec.709 luminance Y; no metameric correction.
- Severity curves are heuristic and do not replace clinical diagnoses.
- ΔE and chromaticity measures use standard CIE conversions but depend on display/profile.