Clinical differences between toric intraocular lens (IOL) and monofocal intraocular lens (IOL) implantation when myopia is determined as target refraction

Abstract

Background: The aim of this study is to analyze and compare the clinical results of toric intraocular lens (IOL) and monofocal IOL implantation when the target refraction value is determined -3 diopter (D) in cataract patients with corneal astigmatism >1.5 diopters (D).Methods: We performed a retrospective chart review for patients with corneal astigmatism >1.5D who underwent cataract surgery and their target refraction is determined -3D. 100 eyes (100 patients; monofocal IOL, 60; toric IOL, 40) were enrolled in the current study. Near and distant uncorrected visual acuity (UCVA), corrected VA, spherical equivalent and refractive, corneal astigmatism were evaluated before and after surgery.Results: The near UCVA of the toric IOL group (0.26±0.33) after cataract surgery was significantly better than that of the monofocal IOL group (0.48±0.32) (p=0.030). The distant UCVA of the toric IOL group (0.38 ± 0.14) was also significantly better than that of the monofocal IOL group (0.55 ± 0.22) (p = 0.026). There were no significant intergroup differences in postoperative best-corrected visual acuity (p = 0.710) and mean spherical equivalent (p = 0.465). In the toric IOL group, postoperative refractive astigmatism was -0.80 ± 0.46D and postoperative corneal astigmatism was -1.50 ± 0.62D, whereas the corresponding values in the monofocal IOL group were -1.65 ± 0.77D and -1.45 ± 0.64D; residual refractive astigmatism was significantly lower with toric IOL implantation compared with monofocal IOL implantation (p = 0.001). There were no postoperative complications and no adverse events were reported.Conclusions: When myopic refraction such as -3D was determined as the target power in patients with corneal astigmatism, toric IOL implantation led to excellent improvement in both near and distant UCVA.

Deadbolt cataract due to misplanted minishunt

“…An astigmatism-corrected near target may be considered in this patient with high myopia, which would also lessen the disparity with her phakic right eye. 2 Part of the preoperative discussion with the patient should include the possibility that toric IOL implantation may not be possible if intraoperative findings preclude adequate intracapsular support and stability.…”

Comparative analysis of a presbyopia-correcting intraocular lens that combines extended depth-of-focus and bifocal profiles with a standard monofocal intraocular lens

“…Likewise, within our study, the UDVA values were 0.08 ± 0.06 and 0.06 ± 0.07 and the CDVA values were 0.03 ± 0.05 and 0.03 ± 0.05 in the ZCB00 and ZFR00 groups, respectively. Previous studies have reported monocular UIVAs (at 66 cm) of 0.25 ± 0.18 [30], 0.34 ± 0.12 [29] for the ZCB00 and 0.05 ± 0.03 [8], 0.04 ± 0.09 [6] for the ZFR00, monocular UNVA (at 40 cm) of 0.48 ± 0.32 [31], 0.51 ± 0.19 [29] for the ZCB00 and 0.03 ± 0.05 [8], 0.05 ± 0.13 [6] for the ZFR00. In the current study, the monocular UIVA (at 66 cm) values were 0.33 ± 0.12 for the ZCB00 and 0.02 ± 0.05 for the ZFR00 and the monocular UNVA (at 40 cm) values were 0.48 ± 0.15 for the ZCB00 and 0.03 ± 0.06 for the ZFR00.…”