Eyes are highly complex and intricate structures but problems can arise with age. In this image from an investigation of elderly Egyptian patients the lens in the centre has both cataract, making it cloudy, and ragged dandruff-like deposits known as pseudoexfoliation around the edge of the protective envelope. Pseudoexfoliation does not affect the function of the eye directly but this study, along with others, showed its presence is associated with a higher risk of common age-related blindness such as cataract and glaucoma. The image was taken using a specialised optical lens, known as a goniolens or gonioscope, which allows an ophthalmologist to see internal structures of the eye.
BPoD stands for Biomedical Picture of the Day. Managed by the MRC London Institute of Medical Sciences the website aims to engage everyone, young and old, in the wonders of biomedicine. Images are kindly provided for inclusion on this website through the generosity of scientists across the globe.
BPoD is also available in Catalan at www.bpod.cat with translations by the University of Valencia.