Descriptive statistics for the Bland-Altman plots34 35 in figures 3 and 4 including the means 
mean differences 
, SDs, SEs, 95% lower limits of agreement (LLoA), 95% upper limits of agreement (ULoA), coefficients of repeatability (CR) and intraclass correlation coefficients (ICC) for 34 right and left eyes of adults for the stigmatic (FI=M), ortho-antistigmatic (FJ=J0) and oblique-antistigmatic (Fk= J45) coefficients of power. Pearson’s correlation coefficients (r) for the means and differences and corresponding p values in parentheses are included as they are a little difficult to read in figures 3 and 4. (For significance at a 95% level, p<0.05 was applied.)
| NETRA before cycloplegia and SR (see figure 3) | ||||
| Stigmatic coefficients (FI=M) | Ortho-antistigmatic coefficients (FJ=J0) | Oblique-antistigmatic coefficients (FK=J45) | ||
| OD |  (sd) | 1.69 (1.82) | 0.05 (0.33) | 0.02 (0.15) |
 (sd) | 1.17 (1.64) | 0.10 (0.19) | 0.01 (0.24) | |
SE for | 0.28 | 0.03 | 0.04 | |
| (LLoA; ULoA) | (2.10; 4.37) | (0.26; 0.47) | (0.48; 0.47) | |
| LoA range | 6.47 | 0.73 | 0.95 | |
| SE for LoA | 0.49 | 0.06 | 0.07 | |
| CR | 3.96 | 0.42 | 0.47 | |
| ICC | 0.53 | 0.81 | 0.22 | |
| r (p) | –0.33 (0.06) | –0.16 (0.36) | –0.81 (4.8×10–9) | |
| OS |  (sd) | 1.59 (1.83) | 0.09 (0.36) | 0.02 (0.14) |
 (sd) | 1.07 (1.65) | 0.04 (0.25) | 0.01 (0.20) | |
SE for | 0.28 | 0.04 | 0.03 | |
| (LLoA; ULoA) | (2.23; 4.31) | (0.45; 0.52) | (0.39; 0.38) | |
| LoA range | 6.54 | 0.97 | 0.77 | |
| SE for LoA | 0.49 | 0.07 | 0.06 | |
| CR | 3.88 | 0.49 | 0.38 | |
| ICC | 0.55 | 0.79 | 0.33 | |
| r (p) | –0.37 (0.03) | –0.13 (0.47) | –0.63 (6.1×10–5) | |
| NETRA after cycloplegia and SR (see figure 4) | ||||
| OD |  (sd) | 1.11 (1.76) | 0.08 (0.33) | 0.04 (0.15) |
 (sd) | 0.01 (0.58) | 0.05 (0.28) | 0.04 (0.24) | |
SE for | 0.10 | 0.05 | 0.04 | |
| (LLoA; ULoA) | (1.16; 1.14) | (0.50; 0.59) | (0.43; 0.51) | |
| LoA range | 2.30 | 1.09 | 0.94 | |
| SE for LoA | 0.17 | 0.08 | 0.07 | |
| CR | 1.14 | 0.55 | 0.48 | |
| ICC | 0.95 | 0.69 | 0.20 | |
| r (p) | –0.17 (0.33) | –0.22 (0.21) | –0.81 (7.7×10–9) | |
| OS |  (sd) | 1.00 (1.80) | 0.08 (0.32) | 0.04 (0.16) |
 (sd) | 0.10 (0.69) | 0.06 (0.24) | 0.04 (0.21) | |
SE for | 0.21 | 0.07 | 0.06 | |
| (LLoA; ULoA) | (1.48; 1.26) | (0.42; 0.59) | (0.44; 0.36) | |
| LoA range | 2.74 | 1.01 | 0.80 | |
| SE for LoA | 0.17 | 0.08 | 0.07 | |
| CR | 1.37 | 0.49 | 0.41 | |
| ICC | 0.93 | 0.74 | 0.38 | |
| r (p) | –0.33 (0.06) | 0.19 (0.28) | –0.73 (1.2×10–6) | |
NETRA, Near Eye Tool for Refractive Assessment; OD, Right eye; OS, Left eye; SR, subjective refraction.