Table 1.

Changes in prevalence of anisometropia in refractive components over ~12 year period and incidence of anisometropia of 1.00D or more.

Diopters of anisometropia		0.00–0.99D	1.00–1.99D	2.00D+	All 1.00D+	Incidence 1.00D+
Equivalent Sphere	1st time	83.9%	10.2%	5.9%	16.1%	21.2%
	2nd time	67.8%	19.5%	12.7%	32.2%
Spherical Error	1st time	83.0%	11.9%	5.1%	17.0%	26.3%
	2nd time	61.9%	24.6%	13.5%	38.1%
Primary Astigmatism	1st time	92.4%	6.8%	0.8%	7.6%	12.7%
	2nd time	82.2%	13.6%	4.2%	17.8%
Oblique Astigmatism	1st time	85.6%	11.9%	2.5%	14.4%	22.9%
	2nd time	70.3%	21.2%	8.5%	29.7%