Table 1

Distribution of spectacle power requirement over a 6D or 7D range

Spherical equivalent (D)		6D range				7D range
Spherical equivalent (D)		Number	%			Number	%
−3.5				13	2.83
−3	12	2.72		12	2.61
−2.5	23	5.22		23	5.00
−2	15	3.40		15	3.26
−1.5	51	11.56		51	11.09
−1	59	13.38		59	12.83
+1	115	26.08		115	25.00
+1.5	91	20.63		91	19.78
+2	45	10.20		45	9.78
+2.5	19	4.31		19	4.13
+3	11	2.49		11	2.39
+3.5				6	1.30
Total	441			460