Visual Pigment Regeneration Rate and Susceptibility to Photic Damage

  • Ellis R. Loew


A number of animals are known to undergo photoreceptor degeneration when kept under conditions of constant, low-level illumination, including rats (1), rabbits (2), monkeys (3) and lobsters (4). However, a far greater number show little, if any, harmful effects from long-term exposure even at intensities equal to that of sunlight. For example, flesh flies kept under constant, approximately 82,000 1x white light showed no signs of photoreceptor damage after 30 days of treatment (personal observation), whereas lobsters exposed for less than 5 minutes to approximately 300 lx showed complete photoreceptor degeneration.


Light Exposure Visual Pigment Retinula Cell Photoreceptor Degeneration NORWAY Lobster 
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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Ellis R. Loew
    • 1
  1. 1.Section of Physiology, Department of Physical BiologyCornell UniversityIthacaUSA

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