Comparison of Barrett and Emmetropia Verifying Optical Toric Calculators

Figures & data

Table 1 Demographics

Parameter	Mean ± SD (Range)
Age (yrs)	71 ± 8.9 (40–89)
Gender (male/female)	46/63
Eye (OD/OS)	66/43
AL (mm)	23.66 ± 0.85 (20.95–26.14)
Mean K (D)	43.92 ± 1.45 (40.83–48.06)
Keratometric astigmatism (D)	1.74 ± 0.38 (1.24–2.86)
ACD (mm)	3.09 ± 0.38 (2.28–3.96)
Implanted IOL power (D)	20.62 ± 2.50 (16–27)
Post-operative manifest refraction
Sphere (D)	−0.30 ± 0.45 (−1.50–1.00)
Cylinder (D)	0.66 ± 0.52 (0–2.50)

Abbreviations: ACD, anterior chamber depth; AL, axial length; D, diopters; IOL, intraocular lens; K, keratometry; OD, right eye; OS, left eye; SD, standard deviation.

Figure 1 Double angle plots depicting the pre-operative corneal astigmatism and post-operative refractive astigmatism for the study population implanted with toric intraocular lenses.

Figure 2 Double angle plots depicting the residual astigmatism predictor error for each eye with the (A) Barrett and (B) Emmetropia Verifying Optical (EVO) v2.0 Toric Calculators.