During the second part of sensory physiology, students study the anatomy and physiology of the eye. Some characteristics students learn about are accommodation, the near point of vision, astigmatism, the blind spot, and color blindness. Students also use a Snellen Eye Chart to measure their visual acuity.
In order to study the refractive properties of the eye, students use an Ingersoll eye model filled with water and various lenses. During this experiment students also learn about common visual defects and how to correct them with the lenses.
Next, students look at the geomentry of the visual field using a perimeter and a color wheel. After mapping their lab partner's visual field, students will see if this field is a perfect circle or not.
The teaching assisants also lead each group through a sheep eye dissection so students can obsereve the anatomy of the eye hands-on, in greater detail.
Topics to Review Before Lab:
- Anatomy of the eye
- Layers of the eye
- Identify muscles of the eye
- Common visual impairments-hyperopia, myopia, astigmatism
- Neural pathway of signals from retina to the brain
- Characteristics of photoreceptors
- Trichomatic theory of color vision
- Bleaching reaction