Mean observed rate of progression with the corresponding 95% central range (2.5th to 97.5th percentile) in brackets as calculated for six visual fields performed in 2 years (A), eight fields in 4 years (B) and 10 fields in 6 years (C) as a function of the real rate of progression and variability (SD of the noise added to MD)
| Rate of progression (dB/year) | Variability | ||
| Low (0.5 dB) | Moderate (1 dB) | High (2 dB) | |
| A | |||
| −0.25 | −0.3 (−0.9 to 0.4) | −0.3 (−1.5 to 1.0) | −0.3 (−2.7 to 2.2) |
| −0.5 | −0.5 (−1.1 to 0.1) | −0.5 (−1.7 to 0.7) | −0.5 (−2.9 to 1.9) |
| −1.0 | −1.0 (−1.6 to −0.4) | −1.0 (−2.2 to 0.2) | −1.0 (−3.4 to 1.4) |
| −2.0 | −2.0 (−2.6 to −1.4) | −2.0 (−3.2 to −0.8) | −2.0 (−4.4 to 0.4) |
| B | |||
| −0.25 | −0.3 (−0.5 to 0.0) | −0.3 (−0.8 to 0.3) | −0.3 (−1.4 to 0.8) |
| −0.5 | −0.5 (−0.8 to −0.2) | −0.5 (−1.1 to 0.1) | −0.5 (−1.6 to 0.6) |
| −1.0 | −1.0 (−1.3 to −0.7) | −1.0 (−1.6 to −0.5) | −1.0 (−2.1 to 0.1) |
| −2.0 | −2.0 (−2.3 to −1.7) | −2.0 (−2.6 to −1.5) | −2.0 (−3.1 to −0.9) |
| C | |||
| −0.25 | −0.3 (−0.4 to −0.1) | −0.3 (−0.6 to 0.1) | −0.3 (−0.9 to 0.4) |
| −0.5 | −0.5 (−0.7 to −0.3) | −0.5 (−0.8 to −0.2) | −0.5 (−1.2 to 0.2) |
| −1.0 | −1.0 (−1.2 to −0.8) | −1.0 (−1.3 to −0.7) | −1.0 (−1.7 to −0.3) |
| −2.0 | −2.0 (−2.2 to −1.8) | −2.0 (−2.3 to −1.7) | −2.0 (−2.7 to −1.3) |