TABLE 1.

Average size of nucleus

Parameter	Mean	Sample size	S.D.	Range
Diameter of intact nucleus	7.36 mm	429	0.65	5.89 mm to 9.21 mm
Diameter of central nucleus	6.43 mm	429	0.56	4.31 mm to 8.06 mm
Thickness of intact nucleus	3.5 mm	429	0.33	2.56 mm to 5.05 mm
Thickness of central nucleus	2.87 mm	429	0.39	2.03 mm to 3.65 mm