p. Nystagmus--an involuntary, rapid movement of the eyeball; normally
q. Photophobia--abnormal sensitivity to and discomfort from light.
r. Presbyopia--"old sight," physiologically blurred vision, often occurs soon after
40 if at all.
s. Ptosis--drooping of the eyelids.
t. Refraction--deviation in the course of rays of light in passing from one
transparent medium into another of different density.
u. Ametropia--a defect in the eye that prevents light rays from being brought to a
single focus on the retina.
v. Strabismus (tropia)--a manifest deviation of the eyes--focusing is not on one
You are now aware of the many areas of the sensory system and the clues to the
body's health problems found in the sensory system. Use this tool for the complete
assessment of your patients.