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. Author manuscript; available in PMC: 2011 Aug 1.
Published in final edited form as: Neurol Clin. 2010 Aug;28(3):789–802. doi: 10.1016/j.ncl.2010.03.012

Figure 2.

Figure 2

Figure 2

(A) Nonorganic constriction of visual field on tangent screen test. The size of the visual field does not increase when the patient is moved farther away from the screen. (B) Organic constriction of visual field on tangent screen test. The size of the visual field increases when the patient is moved farther away from the screen. From Biousse V, Newman NJ. Neuro-ophthalmology Illustrated. New York: Thieme 2009; p. 507 with permission.