Cells of the Retinal Pigment Epithelium (image) University of Tampere Share Print E-Mail Caption Cells of the retinal pigment epithelium. An epithelial cell is in the middle with microvilli (golden), voltage-gated sodium channels (white), and the photoreceptor cells of the retina (blue) made fluorescent and imaged with a high-resolution confocal microscope. The size of the image is 38 x 38 micrometres (one micrometre is one thousandth of a millimetre). Credit Julia Johansson and Teemu Ihalainen, Tampere University Usage Restrictions For media use with this press release only Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.