An accessory chromophore in red vision

Chromophore transformations in red fluorescent proteins.

Human infrared vision is triggered by two-photon chromophore isomerization.

Vision relies on photoactivation of visual pigments in rod and cone photoreceptor cells of the retina. The human eye structure and the absorption spectra of pigments limit our visual perception of light. Our visual perception is most responsive to stimulating light in the 400- to 720-nm (visible) range. First, we demonstrate by psychophysical experiments that humans can perceive infrared laser ...

Red fluorescent proteins: chromophore formation and cellular applications.

In the last decade, a number of red fluorescent proteins (RFPs) that emit orange, red, and far-red fluorescence have been isolated from anthozoans (corals), and developed through directed molecular evolution. An attractive property possessed by some RFPs is that their red fluorescence can be turned on or modulated by illumination at specific wavelengths. Recent progress in the development of RF...

Vision in Hyphema

An accessory tongue.

An accessory tongue is a rare anomaly. In the literature, only a few case reports have been cited. We report a 28-year-man with this anomaly. The patient was treated with a simple surgical excision.