Fig. 4
From: Investigation of a real-time location system of corneal astigmatic axis
Bland-Altman analysis. The dotted lines represent 95% Limits of Agreement (LoA). The intermediate solid line represents the mean of the deviation. The shorter four solid lines represent the 95% Confidence Interval (CI) of LoA. a When corneal astigmatism was 1.00 to 2.00 D, the CI of LoA was −9.14° to 10.40°, 1 point (1/32, 3.1%) outside the CI of LoA (P = 0.35). Within the agreed limits, the maximum and average absolute axial deviation of corneal astigmatism between the Real-time Computerized Location System (RCLS) and Scheimpflug method were 8.91° and 0.63°; b When corneal astigmatism was greater than 2.00 D, the CI of LoA was −3.64° to 3.77°, 1 point (1/25, 4.0%) outside the CI of LoA (P = 0.82). Within the agreed limits, the maximum and average axial deviation of corneal astigmatism between RCLS and Scheimpflug method were 3.19° and 0.06°