A calibration pipeline for controlled ocular photostimulation with consumer see-through extended-reality glasses
Year: 2026
Type: preprint
Abstract: Consumer extended-reality (XR) glasses could provide controlled ocular light exposure, but their settings do not specify the light delivered at the eye. We developed and validated a calibration pipeline linking display control, corneal-plane spectroradiometry, settings-to-exposure modeling, and rendered application content for a see-through binocular micro-OLED display (VITURE Luma Ultra). Automated measurements characterized color channels, digital codes, hardware brightness levels, and duty-cycle settings across repeated fittings on a phantom head. The blue primary peaked at 459 nm with no resolved spectral shift across intensity settings. Blue melanopic equivalent daylight illuminance (EDI) ranged from 14.7 to 252 lx across hardware brightness levels, while full white delivered 269 lx melanopic EDI at its highest usable setting, exceeding the 250 lx daytime recommendation for healthy adults. A model calibrated on separate sessions predicted melanopic EDI for held-out codes, brightness levels, and color mixtures with a mean absolute percentage error of 3.4% (4.5% for photopic illuminance), allowing exposure to be estimated from logged display settings without remeasuring each uniform stimulus. Rendered application frames revealed position- and illuminated-area-dependent exposure; a spatial correction derived from an independent display grid accounted for these effects and closely reproduced measured frame exposure. Together, these results establish a reusable workflow for converting see-through XR hardware into a quantitatively specified ocular-light platform.
Source: medRxiv
Authors: Matt Gaidica, Matthew Rosengart
Institution: Washington University in St. Louis
Subfield: Endocrine and Autonomic Systems
Field: Neuroscience
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7204796482