LEDs for Multispectral Imaging of the Ocular Fundus

Researchers at the University College London have developed a method to acquire multispectral images of the ocular fundus using LED illumination and a high-sensitivity CCD camera. Multispectral imaging makes it possible to visualize the different light absorbing characteristics of chromophores, the color-defining parts of the molecules. The five distinct colored compounds prevalent in the eye; retinal hemoglobins, choroidal hemoglobins, choroidal melanin, retinal pigment epithelium melanin, and macular pigment can be discriminated in the multispectral images. Because the system is faster than previous multispectral imaging methods, it allows for important
features such as small retinal blood vessels and microhaemorrhages to be resolved. Parametric maps calculated from the images might help in early diagnosis of several diseases. The work is published in the journal Review of Scientific Instruments.
Full story from American Institute of Physics : LEDs Illuminate Eye for Ocular Disease Screening…
Article: Multispectral Imaging of the Ocular Fundus using LED Illumination (.pdf)