Poster Session: Application of a DMD projector to assess contrast sensitivity perception by creating shades of grey for visual stimuli

Greyscale quality on displays is crucial for contrast sensitivity perception. Digital Micro-mirror Devices (DMD) operating in the kHz range allow for different greyscale depths. This is crucial for accurate testing of contrast sensitivity and for accurate vision stimulation especially in vision-impaired patients, as there is growing interest around the applications of these devices. Here, we explore a DMD projector (Vialux) for monocular contrast sensitivity determination in 5 healthy subjects (ages 23 - 55 years) using Gabor patches at different orientations, contrasts, and spatial frequencies. Subjects wore their habitual refractive correction while CS was tested at the fovea. For all subjects, we found that increasing the number of bitplanes used to project stimuli resulted in a more accurate and uniform representation of greyscale. Ultimately, the technology will be used for novel instrumentation that will help vision-impaired patients suffering from age-dependent vision loss. These findings may impact the choice of display technologies in clinical settings where precise visual evaluation is essential.