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Home > All Images > 2002 > February > 11 Feb 2002

Images Dated 11th February 2002

Choose from 18 pictures in our Images Dated 11th February 2002 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Retina, SEM Featured 11 Feb 2002 Print

Retina, SEM

Retina. Coloured scanning electron micrograph (SEM) of a section through a freeze-fractured retina, showing the light-sensitive rods and cones and their associated neurones. Light entering the eyes passes through the bipolar neurones in the nuclear layers (purple, lower frame). It then hits the rods and cones (pink/yellow, upper frame). The rods, used in dim light, are found at the retinal margins. The cones, which control colour vision and acuity (sharpness), function best in bright light. They are concentrated in the centre of the retina. Information from both is passed to the neurons, which relay it to the optic nerve (not seen). Magnification: x1000 at 6x7cm size

© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY