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. Author manuscript; available in PMC: 2011 May 1.
Published in final edited form as: Pain. 2010 Mar 4;149(2):235–242. doi: 10.1016/j.pain.2010.02.004

Figure 2.

Figure 2

Light-evoked Vc/C1 activity requires input through the trigeminal ganglion. Intra-TRG (open circles) or intravitreal (ivt, solid squares) injection of lidocaine (2%, 1 μl) blocks completely the responses to high intensity light, whereas application to the ocular surface (open triangles) has no effect. **P < 0.01 versus pre-lidocaine value. b = P < 0.01 versus other groups.