Table 5.

Fixation Stability as Measured Using the Bivariate Contour Ellipse Area Across Different Categories of the Fujii Classification. Certain Values of the BCEA May Correspond to All Three Fujii Categories (“Unstable,” “Relatively Unstable,” or “Stable”) at the Same Time

BCEA Probability Area	Fujii Categories
	Unstable		Relatively Unstable		Stable
	Mean ± SD	Range	Mean ± SD	Range	Mean ± SD	Range
BCEA in deg2 during fixation task	N = 47		N = 145		N = 235
1SD	18.5 ± 20.6	3.8–134.9	5.6 ± 4.4	1.4–32.6	1.3 ± 1.4	0.01–8.5
2SD	50.1 ± 55.9	10.3–365.6	15.0 ± 11.9	3.7–88.5	3.5 ± 3.8	0.03–23.0
3SD	95.8 ± 107.0	19.7–699.9	28.8 ± 22.8	7.0–169.3	6.7 ± 7.2	0.06–44.0
BCEA in deg2 during macular sensitivity test	N = 158		N = 180		N = 80
1SD	24.2 ± 20.3	4.4–163.9	6.9 ± 3.4	0.04–20.1	2.0 ± 2.0	0.2–9.8
2SD	65.5 ± 55.1	11.8–444.1	18.6 ± 9.3	0.10–54.6	5.5 ± 5.4	0.4–26.6
3SD	125.3 ± 105.4	22.6–850.1	35.5 ± 17.8	0.19–104.4	10.5 ± 10.4	0.8–50.9