Fig. 1.

Four quadrants and eight sectors of the cpRNFL thickness using the ONH protocol. The ONH measurements were performed with 13 concentric circle ring scans and 12 radial line scans. The cpRNFL thicknesses in the four quadrants and eight sectors were defined as follows: superior (S), temporal (T), inferior (I), nasal (N), superior temporal (ST), temporal upper (TU), temporal lower (TL), inferior temporal (IT), inferior nasal (IN), nasal lower (NL), nasal upper (NU), and superior nasal (SN). cpRNFL circumpapillary retinal nerve fiber layer, ONH optic nerve head map