TABLE 2.

Correlation of age vs central nucleus diameter

Age group	No of patients	Mean diameter	S.D.
< 40 yrs.	18	5.50 mm	0.45
41-50 yrs.	77	5.93 mm	0.39
51-60 yrs.	143	6.30 mm	0.35
61-70 yrs.	130	6.71 mm	0.35
> 71 yrs.	61	7.08 mm	0.43

Analysis of variation
Variation	s.s.	DF.	MS	F Statistic	P value
Between	74.05	4	18.51	133.13	< 0.001
Within	58.96	424	0.13
Total	133.01	428