Intraocular and Interocular GCC Asymmetry – Page 32 of 47

The GCC in the OD is thinnest inferior temporal to the fovea and corresponds to the superior nasal field loss on the 10-2 visual field. In contrast, the GCC OS appears normal and corresponds to a normal 24-2 visual field. In patients with unreliable visual fields, the GCC is even more helpful. It is not unusual for GCC thinning to occur prior to visual field loss as demonstrated here in the OD with an attenuated superior GCC but a normal inferior field OD.