Comparison between Refractive Outcome of Primary Piggyback Intraocular Lens versus Secondary Lens Iris Claw Lens in Posterior Microphthalmos

Table 2

Visual acuity and refraction along the postoperative follow-up period.

Mean + SD range	1 month	6 months	12 months	24 months	36 months
1ry piggyback: UDVA (logMAR)	0.73 + 0.34 (0.3 to 1.0)	0.70 + 0.32 (0.3 to 1.0)	0.71 + 0.29 (0.3 to 1.0)	0.68 + 0.30 (0.2 to 1.0)	0.69 + 0.30 (0.2 to 1.0)
2ry Artisan: UDVA (logMAR)	0.43 + 0.22 (0.3 to 0.9)	0.41 + 0.19 (0.2 to 0.9)	0.39 + 0.16 (0.2 to 0.8)	0.40 + 0.18 (0.2 to 0.8)	0.39 + 0.17 (0.2 to 0.8)
value	0.005	0.003	0.003	0.003	0.002
1ry piggyback: CDVA (logMAR)	0.44 + 0.19 (0.1 to 0.8)	0.41 + 0.16 (0.1 to 0.8)	0.42 + 0.17 (0.1 to 0.8)	0.46 + 0.17 (0.2 to 0.8)	0.41 + 0.16 (0.1 to 0.8)
2ry Artisan: CDVA (logMAR)	0.42 + 0.20 (0.2 to 0.7)	0.40 + 0.18 (0.2 to 0.7)	0.39 + 0.16 (0.1 to 0.7)	0.38 + 0.17 (0.1 to 0.7)	0.39 + 0.16 (0.1 to 0.7)
value	0.647	0.728	0.612	0.493	0.653
1ry piggyback: MRSE (D)	1.11 + 1.32 (−1.0 to + 3.5)	1.01 + 1.26 (−1.0 to + 2.75)	1.05 + 1.28 (−1.0 to + 3.0)	1.03 + 1.28 (−1.0 to + 3.0)	1.05 + 1.29 (−1.0 to + 3.0)
2ry Artisan: MRSE (D)	0.12 + 0.72 (−1.0 to +1.5)	0.09 + 0.69 (−1.0 to +1.5)	0.08 + 0.66 (−1.0 to +1.5)	0.08 + 0.67 (−1.0 to +1.5)	0.07 + 0.66 (−1.0 to +1.5)
value	0.024	0.029	0.037	0.039	0.034
1ry piggyback: MAE (D)	1.42 + 1.06 (0.50 to 3.35)	1.39 + 0.93 (0.25 to 3.35)	1.37 + 0.95 (0.25 to 3.10)	1.36 + 0.98 (0.25 to 3.10)	1.35 + 0.96 (0.25 to 3.10)
2ry Artisan: MAE (D)	0.55 + 0.46 (0.25 to 1.15)	0.52 + 0.43 (0.25 to 1.40)	0.51 + 0.40 (0.00 to 1.40)	0.53 + 0.41 (0.00 to 1.40)	0.52 + 0.42 (0.00 to 1.40)
value	0.009	0.007	0.005	0.006	0.005

SD: standard deviation; UDVA: uncorrected distance visual acuity; CDVA: corrected distance visual acuity; MAE: mean absolute error, value: compares mean of 1ry Piggyback vs. 2ry Artisan using independent sample t-test. Statistically significant.