Efficacy of 4-Haptic Bitoric Intraocular Lens Implantation in Asian Patients with Cataract and Astigmatism
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Purpose: To determine the efficacy of 4-haptic bitoric intraocular lens (IOL) implantation in Asian patients withcataract and astigmatism. Methods: A total of 19 eyes with ≤25.0 mm axial length and ≥0.75 diopters (D) corneal astigmatism wereincluded in this prospective non-comparative study. All subjects underwent phacoemulsification with implantationof an AT Torbi 709M IOL. Visual and refractive outcomes as well as toric IOL axis were evaluatedduring a 3-month follow-up. Errors in predicted residual spherical equivalent were calculated by subtractingpredicted residual spherical equivalent from postoperative refraction. Results: Uncorrected and corrected distance visual acuity improved significantly 3 months after surgery, from0.43 to 0.05 and from 0.24 to -0.05, respectively. Mean refractive cylinders also decreased significantly, from-1.91 preoperatively to -0.54 D 3 months after surgery. Mean J0 and J45 decreased 3 months postoperatively,from 0.26 to 0.03 D and from 0.24 to -0.06 D, respectively. After 3 months, mean absolute IOL rotationwas 1.81º. Errors in predicted residual spherical equivalent showed a hyperopic shift of 0.35 D. Conclusions: Implantation of 4-haptic bitoric IOL proved to be effective for correcting astigmatism in Asianeyes during cataract surgery.
Abstract
Purpose: To determine the efficacy of 4-haptic bitoric intraocular lens (IOL) implantation in Asian patients withcataract and astigmatism. Methods: A total of 19 eyes with ≤25.0 mm axial length and ≥0.75 diopters (D) corneal astigmatism wereincluded in this prospective non-comparative study. All subjects underwent phacoemulsification with implantationof an AT Torbi 709M IOL. Visual and refractive outcomes as well as toric IOL axis were evaluatedduring a 3-month follow-up. Errors in predicted residual spherical equivalent were calculated by subtractingpredicted residual spherical equivalent from postoperative refraction. Results: Uncorrected and corrected distance visual acuity improved significantly 3 months after surgery, from0.43 to 0.05 and from 0.24 to -0.05, respectively. Mean refractive cylinders also decreased significantly, from-1.91 preoperatively to -0.54 D 3 months after surgery. Mean J0 and J45 decreased 3 months postoperatively,from 0.26 to 0.03 D and from 0.24 to -0.06 D, respectively. After 3 months, mean absolute IOL rotationwas 1.81º. Errors in predicted residual spherical equivalent showed a hyperopic shift of 0.35 D. Conclusions: Implantation of 4-haptic bitoric IOL proved to be effective for correcting astigmatism in Asianeyes during cataract surgery.
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