Table 1

Intended (target) and postoperative refractive errors, and the differences between the two, using the five different formulae for post LVC eyes. Similar data shown for control eyes using the SRK-T formula

		Intended (target)	Difference between Intended and post-op	Post-op
		Sphere/cylinder × axis	Sphere/Cylinder × axis	Sphere/Ccylinder × Aaxis
CHM	Mean	−0.58/+0.76×89	−0.90/+0.68×0	−0.58/+0.1×27
	Upper 95% CI	+2.74/–1.34×28	+1.14/+1.73×150	+1.11/+1.43×146
	Lower 95% CI	−1.76/–1.42×151	−3.92/+1.59×36	−2.12/–1.54×143
Masket	Mean	−0.81/+0.61×83	−0.42/+0.65×178	−0.58/+0.10×27
	Upper 95% CI	+2.74/–1.34×28	+1.14/+1.73×150	+1.11/+1.43×146
	Lower 95% CI	−1.76/–1.42×151	−3.92/+1.59×36	−2.12/–1.54×143
Haigis-L	Mean	−0.37/+0.61×84	−0.79/+0.65×178	−0.58/+0.10×27
	Upper 95% CI	+1.29/+1.19×138	+0.95/+1.74×151	+1.11/+1.43×146
	Lower 95% CI	−1.05/–1.95×156	−3.47/+1.45×37	−2.12/–1.54×143
Shammas-PL	Mean	−0.42/+0.61×84	−0.74/+0.65×178	−0.58/+0.10×27
	Upper 95% CI	+1.53/+1.10×136	+1.01/+1.78×152	+1.11/+1.43×146
	Lower 95% CI	−1.42/–1.88×155	−3.44/+1.43×39	−2.12/–1.54×143
Barrett True-K	Mean	−0.71/+0.61×84	−0.45/+0.65×178	−0.58/+0.10×27
	Upper 95% CI	+0.94/+1.20×139	+1.12/+1.82×153	+1.11/+1.43×146
	Lower 95% CI	−1.36/–1.97×157	−2.99/+1.41×40	−2.12/–1.54×143
Controls	Mean	−0.51/+0.33×11	−0.29/+0.56×164	−0.75/+0.80×174
	Upper 95% CI	−0.16/+1.38×139	+0.39/+1.68×146	+0.10/+1.81×154
	Lower 95% CI	−2.04/+1.67×38	−1.75/+1.01×36	−2.30/+1.19×34

CHM, clinical history method; Shammas-PL, Shammas post-Lasik.