## 3 Results  
The descriptive statistics of each retinal layer in the ETDRS sectors are shown in Table 1. On average, the thickness in the central circle was more than that of the surrounding circles for ONL, OS, and RPE. The opposite tendency was seen for the other five layers. Comparing inner and outer circles, the RNFL was thicker in the outer circle than in the inner circle, except for the temporal sector where no such tendency was seen. For all the other layers except OS, the inner circle was thicker than the outer circle. The thickness was similar in the inner and outer circle for OS.  
Figure 2 shows the Rlimit values of the measurements for each retinal layer in each sector of the macular ETDRS map. In five out of eight layers (GCL, IPL, INL, OS, and RPE), the Rlimit was less than 5 \(\upmu\)m in all the ETDRS sectors. For each of these five layers, the maximum difference in Rlimit among the sectors was 4 \(\upmu\)m. For OPL, the Rlimit was below 10 \(\upmu\)m for all the sectors and the maximum difference among them was 7 \(\upmu\)m. Both RNFL and ONL had some sectors with Rlimit exceeding 10 \(\upmu\)m (RNFL-inner nasal sector and  
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline  & **Central** & \begin{tabular}{c} **Inner** \\ **Inferior** \\ \end{tabular} & \begin{tabular}{c} **Outer** \\ **Inferior** \\ \end{tabular} & \begin{tabular}{c} **Inner** \\ **Nasal** \\ \end{tabular} & \begin{tabular}{c} **Outer** \\ **Nasal** \\ \end{tabular} & \begin{tabular}{c} **Inner** \\ **Super-** \\ **prior** \\ \end{tabular} & \begin{tabular}{c} **Outer** \\ **Super-** \\ **prior** \\ \end{tabular} & \
\begin{tabular}{c} **Inner** \\ **Tern-** \\ **poral** \\ \end{tabular} &
\begin{tabular}{c} **Outer** \\ **Temporal** \\ **poral** \\ \end{tabular} \\ \hline RNFL & \(11\pm 6\) & \(27\pm 3\) & \(40\pm 5\) & \(23\pm 6\) & \(\begin{array}{c}50\pm\\ 4.9\end{array}\) & \(25\pm 3\) & \(39\pm 5\) &  
ONL-Central, inner superior, and inner inferior sectors). The maximum difference in Rlimit among the sectors for RNFL and ONL were 11 and 10 \(\upmu\)m, respectively.  
The relationship between the Sw and the CoV for the eight individual layers is shown in Figure 3. The Sw of the GCL, IPL, INL, OS, and RPE layers was under 2 \(\upmu\)m and the CoV was below 7.5%. In GCL, IPL, and INL, the central sector had the largest CoV though the Sw was similar to the other sectors, whereas the central sector in OS and RPE showed the best Sw (around 0.5 \(\upmu\)m) and CoV (around 1%). For the other three layers (RNFL, OPL, and ONL), the Sw values had a larger spread among the sectors, though the maximum Sw value was about 4.5 \(\upmu\)m. For these layers, the least variability in CoV among the sectors was seen for ONL with the maximum CoV of 5%. For both OPL and ONL, the central and inner sectors except the inner temporal sector had larger Sw compared to the outer sectors (OS and RPE). The RNFL showed the largest variability in CoV among the sectors with the maximum CoV of 21%. In RNFL, except for the inner nasal sector, the other sectors showed smaller and similar Sw values (around 2.5 \(\upmu\)m). However, the CoV of RNFL in both the central and the inner nasal sector was almost three times larger compared to the other sectors.  
Figure 2: Repeatability limit values of the measurements for each retinal layer in each sector of the ETDRS map. Retinal Nerve Fiber Layer (RNFL), Ganglion Cell Layer (GCL), Inner Plexiform Layer (IPL), Inner Nuclear Layer (INL), Outer Plexiform Layer (OPL), Outer Nuclear Layer (ONL), Outer Segment (OS), and Retinal Pigment Epithelium (RPE).