2014 Vision

Lecture Objectives

At the end of this lecture, you should be able to:

  1. Be able to describe the neurotransmitters involved in eyelid movements, and characterize the purpose and types of blinking. Explain tear production and how it is regulated.

  2. Be able to explain the processes of refraction and accomodation as they apply to transmission of light to the retina.  Diagram the projection of the left and right visual fields onto the nasal and temporal retinas.  Define the following refractive errorscataracts, hyperopia, myopia, presbyopia and astigmatism.

  3. Describe mydriasis and miosis, including the neurotransmitters involved.

  4. Explain how the aqueous humor is formed and drains, and outline control mechanisms for each part of the process.  Detail the differences between closed angle and open angle glaucoma.

  5. Compare and contrast the physiology of rods and cones.  Relate the physiological differences between rods to the different forms of visual acuity.  Differentiate between retinopathy and retinitis pigmentosa.

  6. List the steps in phototransduction, including the properties of the receptor potential.

  7. Describe the visual cycle, and understand the perturbations that occur to this process during vitamin A deficiency and macular degeneration.

Email: Dr. Janet Fitzakerley | ©2014 University of Minnesota Medical School Duluth | Last modified: 8-feb-14 4:25 PM