The area under the receiver operating characteristics ( AUC ) for glaucoma diagnosis was determined from the average thickness of the total 100 grids ( 6 6 mm ) , central 44 grids ( 3.6 4.8 mm ) , and peripheral 56 grids ( outside of the 44 grids ) , and for each macular sublayer : macular RNFL ( mRNFL ) , ganglion cell layer plus inner plexiform layer ( GCL/IPL ) , and mRNFL plus GCL/IPL ( ganglion cell complex [ GCC ] ) .