Overview

• The Oz system selectively activates individual M-cone cells in the retina using adaptive optics and laser technology, creating the perception of a new color named 'olo.'
• Five participants reported seeing 'olo,' described as a highly saturated blue-green hue outside the natural human color gamut.
• Color-matching experiments confirmed that 'olo' could only be matched by desaturating it with white light, validating its unique perceptual qualities.
• The study, published in *Science Advances*, highlights potential applications in vision science, such as exploring color blindness therapies and advanced display technologies.
• Some experts question whether 'olo' is truly a novel color, arguing it may be an extreme variant within the existing color spectrum.