To compare the rotational stability of a plate-haptic toric intraocular lens (IOL) versus a C-loop haptic toric IOL in myopic cataract eyes.
EENT Hospital of Fudan University, China.
Prospective, randomized, controlled study.
Cataract eyes with axial length (AXL)>24.5 mm were randomly assigned to receive implantation of a C-loop haptic toric IOL (AcrySof Toric IOL, Group A) or a plate-haptic toric IOL (AT TORBI 709M, Group B). IOL rotation, residual astigmatism (RAS), visual acuity and high-order aberrations (HOAs) evaluated with OPD-Scan III aberrometer were compared at 3 months postoperatively. In total, 62 eyes of 62 patients were eligible for analysis: 31 in Group A and 31 in Group B.
The mean rotation of toric IOLs was greater in Group A than in Group B (8.00±3.60° vs 4.42±3.24°, respectively, p<0.001), especially when IOLs were vertically placed. IOL rotation was positively correlated with AXL in Group A while no such correlations were found in Group B. RAS in Group A was greater than that in Group B (-0.76±0.30D vs -0.51±0.29D, respectively, p=0.001). Fewer eyes achieved a RAS of ≤0.50D in Group A than in Group B (38.71% vs 64.52%). Group A had worse postoperative uncorrected visual acuity and higher total HOAs and coma for a 6mm pupil than Group B, while postoperative corrected visual acuity was not different between the two groups.
The plate-haptic toric IOL may be a better choice for myopic cataract eyes with corneal astigmatism due to reduced postoperative rotation.