Table 5.

Spherical Equivalent Stratified by Sex and Decade

Year	Sex	Mean (D)	Standard Deviation (D)	Median (D)	Minimum (D)	Maximum (D)
1960s	Female	−0.47	2.58	0	−13.5	11.875
	Male	−0.31	2.66	0	−21	14.5
1970s	Female	−0.87	2.78	−0.25	−29	11.5
	Male	−0.92	2.31	−0.25	−9.75	12
1980s	Female	−1.23	2.91	−0.75	−31.25	9.25
	Male	−1.46	2.84	−0.75	−11.375	13.25
1990s	Female	−1.64	2.80	−1.125	−11.5	13
	Male	−1.52	2.68	−0.875	−14.375	8.125
2000s	Female	−1.98	2.98	−1.25	−22.625	15.5
	Male	−1.74	2.90	−1.125	−30	38.5
2010s	Female	−1.93	3.00	−1.25	−26	15.5
	Male	−1.73	2.94	−1.125	−33	15.5

D= Diopters