Anatomía interna y externa del ojo

La córnea permite que la luz penetre en el ojo. A medida que la luz pasa a través del ojo, el iris cambia su forma al expandirse y permitir que pase más luz o al contraerse y permitir que pase menos luz para cambiar el tamaño de la pupila. Posteriormente, el cristalino cambia de forma para permitir un enfoque cuidadoso de luz en la retina. La luz excita los fotoreceptores que, paulatinamente, mediante un proceso químico, transmiten señales nerviosas al cerebro a través del nervio óptico. Finalmente, el cerebro procesa estos impulsos nerviosos y los traduce en forma de visión.Anatomía interna y externa del ojo

Revision

Last reviewed 1/4/2012 by A.D.A.M. Editorial Team: David Zieve, MD, MHA, and David R. Eltz. Previously reviewed by David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by Joseph V. Campellone, MD, Division of Neurology, Cooper University Hospital, Camden, NJ. Review provided by VeriMed Healthcare Network (2/5/2011).

Disclaimers

  • The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition.
  • A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions.
  • Call 911 for all medical emergencies.
  • Links to other sites are provided for information only -- they do not constitute endorsements of those other sites.
A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited. adam.com