University of Georgia Study Links Blue Light Exposure to Reduced Visual Sharpness

Research from the University of Georgia indicates that short-wavelength blue light, commonly emitted by modern LEDs, may meaningfully degrade human visual acuity. The eye's cornea and lens suffer from longitudinal chromatic aberration, causing blue light to focus in front of the retina rather than on it, producing inherent blur. Beyond this optical effect, blue photons undergo significantly greater intraocular scatter than longer wavelengths due to Rayleigh scattering, which diminishes contrast especially at fine detail levels. Together, these optical and structural effects broaden the eye's point spread function, effectively acting as a low-pass filter that strips high-frequency visual information. The findings raise questions about whether current lighting standards, which rely heavily on LED sources rich in blue wavelengths, may be inadvertently compromising everyday vision quality.