Topic outline

  • Retina, Vitreous, and Choroid


    Focusing light from the outside world so that it forms a useful image is just half the battle of producing sight. After the light is focused it needs to be converted into electrochemical signals so that the optic nerve can carry the signal into our brain for processing.

    The retina is a multilayered structure made of very specialized cells which are capable of converting light into these electrical signals. However, the retina is in close association with the vitreous anteriorly and the choroid posteriorly.

    This module covers a wide range of topics beginning with the anatomical relationships between these structures. We then move on to discuss how light is converted into useful signals in the retina.

    After discussing the structures in their healthy form we look at a couple important types of pathology including macular degeneration, vascular problems of the retina, situations in which the retina can become detached from its supporting structures in the eye, and finally a special condition called Retinitis Pigmentosa in which the cells responsible for converting light to useable signals begin to die.

    The retina and its supporting structures are truly fascinating. Their ability to convert light into an electrochemical signal is a marvel of evolution.

    Let's explore how this complex and delicate system works.

    Issue Date: 08/01/2020