Assessment of agreement between repeated measurements of horizontal (A) and vertical (B) threshold aniseikonia
| 1st reading | 2nd reading | Difference between readings | Coefficient of repeatability | |
|---|---|---|---|---|
| Mean (SD) | Mean (SD) | Mean (SD) | ||
| N, 10. | ||||
| Two readings were taken on 10 subjects in the control group (Nos 1, 3, 5, 7, 9, 10, 11, 12, 13, and 15) with a 2 week interval. Induced aniseikonia with size lenses, magnification (m): −9%, −5%, 0%, 5%, 9%. | ||||
| (A) Induced horizontal aniseikonia with size lenses | ||||
| −9% | −8.4 (1.10) | −7.8 (0.54) | 1 (0.53) | 1.05 |
| −5% | −4.5 (0.47) | −4.7 (0.42) | 0.3 (0.42) | 0.84 |
| 0% | −0.2 (0.59) | −0.05 (0.55) | 0.5 (0.53) | 1.05 |
| 5% | 4.0 (0.71) | 4.3 (0.63) | 0.5 (0.41) | 0.82 |
| 9% | 8.0 (1.07) | 8.1 (0.96) | 0.6 (0.52) | 1.03 |
| Mean (SD) | 0.58 (0.519) | 1.03 (0.119) | ||
| (B) Induced vertical aniseikonia with size lenses | ||||
| −9% | −7.8 (1.14) | −7.9 (0.85) | 0.7 (0.53) | 1.06 |
| −5% | −4.6 (0.83) | −4.7 (0.42) | 0.3 (0.42) | 0.88 |
| 0% | 0.1 (0.62) | 0.3 (0.43) | 0.45 (0.37) | 0.74 |
| 5% | 4.7 (1.13) | 4.5 (1.10) | 0.5 (0.41) | 0.82 |
| 9% | 8.1 (0.70) | 7.8 (0.48) | 0.8 (0.42) | 0.84 |
| Mean (SD) | 0.57 (0.440) | 0.84 (0.119) | ||