Seeing Through Uncertainty: Optical Operations as a Design Vocabulary for Uncertainty Visualization

Abstract

Uncertainty visualizations often require viewers to interpret additional marks, glyphs, bands, or statistical conventions layered onto a primary display. We explore a complementary approach: rendering uncertainty as an optical condition of seeing. In this framing, data are viewed through an imperfect medium whose apparent physical properties are controlled by uncertainty. We introduce a design vocabulary of optical operations for uncertainty visualization, including blur, frost, absorption, roughness, thickness, microfacet scattering, refraction, and caustics. We organize these operations by how they affect visual information: suppressive operations reduce visibility, diffusive operations reduce recoverability, displacive operations alter apparent position, and generative operations create new apparent structure. This distinction suggests a mapping between degradation and value uncertainty, and between displacement and positional uncertainty, while identifying caustics and other structure-generating effects as high-risk sources of visual confounds.