Residual Astigmatism and Defocus Curve in Eyes with Trifocal Intraocular Lens

DOI Open Access
  • Kunisho Akane
    Department of Ophthalmology, Kanazawa Medical University
  • Takayama Ayako
    Department of Ophthalmology, Kanazawa Medical University Medical Technical Division, Kanazawa Medical University Hospital
  • Ukai Yuki
    Department of Ophthalmology, Kanazawa Medical University Medical Technical Division, Kanazawa Medical University Hospital
  • Shibuya Eri
    Department of Ophthalmology, Kanazawa Medical University Medical Technical Division, Kanazawa Medical University Hospital
  • Yamazaki Mai
    Department of Ophthalmology, Kanazawa Medical University Medical Technical Division, Kanazawa Medical University Hospital
  • Shibata Teppei
    Department of Ophthalmology, Kanazawa Medical University
  • Shibata Naoko
    Department of Ophthalmology, Kanazawa Medical University
  • Hatsusaka Natsuko
    Department of Ophthalmology, Kanazawa Medical University
  • Yamamoto Naoki
    Department of Ophthalmology, Kanazawa Medical University
  • Kubo Eri
    Department of Ophthalmology, Kanazawa Medical University
  • Sasaki Hiroshi
    Department of Ophthalmology, Kanazawa Medical University

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Other Title
  • 3焦点眼内レンズ挿入眼の残余乱視と焦点深度曲線

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Abstract

<p>Purpose: To investigate the effect of residual astigmatism (RA) on defocus curve in eyes post trifocal intraocular lens (IOL) implantation. Methods: This study involved 29 eyes of 21 patients (mean age: 58.7±9.9 years) who underwent trifocal IOL (PanOptix, Alcon) implantation at our university hospital from May to October 2019. At 1- to 3-months postoperative, the defocus curves of spherical equivalent (SE) in steps of 0.5 diopters (D) over the range of +1.0D to -3.0D was assessed. Eyes were assigned into against-the-rule astigmatism groups (AG: 0D, -0.5D, and -1.0D) and compared. Results: Though there was a difference between AG 0D (100%) and -0.5D (62.1%), both had a visual acuity (VA) of ≤ 0.1 logMAR from SE+0.5D to -2.5D. Compared to AG 0D from SE 0D to -3.0D, VA in AG -1.0D decreased, except at the SE -1.0D and -3.0D, and VA in AG -0.5D decreased, except at the SE -1.5D and -2.0D (p＜0.05). Even in AG 0D, VA decreased by less than 0 logMAR, except at the SE 0D and -2.0D. Conclusion: The PanOptix-implanted eyes with RA 0D had good VA from 40 cm to 5 meters. The influence of RA -0.5D on VA was evident only in SE 0D, and all distance VA was remarkably decreased in eyes with RA -1.0D, thus illustrating that highly accurate astigmatism correction is vital.</p>

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