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A Comparative Analysis of Tolerance to Induced Astigmatism Across Various Categories of Intraocular Lenses.

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Tolerance to Simulated Astigmatism and Patient-Reported Outcomes of a Violet Light-Filtering Diffractive Full Visual

Hugo T F Borges1, Rupal H Trivedi1, Munjal Pandya1

  • 1Medical University of South Carolina, Storm Eye Institute, Charleston, South Carolina.

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This study found that violet light-filtering diffractive full visual range intraocular lenses (VLF FVR IOL) demonstrate good tolerance to simulated astigmatism, particularly with-the-rule (WTR) orientation, leading to high patient satisfaction.

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Area of Science:

  • Ophthalmology
  • Optics
  • Biomedical Engineering

Background:

  • Cataract surgery often involves intraocular lens (IOL) implantation to restore vision.
  • Pseudophakic patients may experience visual disturbances due to simulated astigmatism.
  • Violet light-filtering diffractive full visual range intraocular lenses (VLF FVR IOL) aim to provide comprehensive visual correction.

Purpose of the Study:

  • To evaluate the tolerance of pseudophakic eyes with VLF FVR IOLs to simulated astigmatism.
  • To assess patient-reported outcomes and visual function after implantation of VLF FVR IOLs.

Main Methods:

  • A prospective, observational study involving 30 patients implanted with VLF FVR IOLs.
  • Simulated astigmatism was induced using cylindrical lenses (+0.50 to +2.00 diopters) in various orientations (WTR, oblique, ATR).
  • Visual acuity was measured, and patient-reported outcomes were collected using the Assessment of IOL Implant Symptoms (AIOLIS) questionnaire.

Main Results:

  • Over 90% of patients achieved 20/40 or better visual acuity with up to 1.50 D of WTR astigmatism.
  • With-the-rule (WTR) astigmatism was better tolerated than against-the-rule (ATR) and oblique orientations.
  • High spectacle independence (96.6%) was reported, with minimal severe optical phenomena (3-7%).

Conclusions:

  • VLF FVR IOLs exhibit good tolerance to induced astigmatism, especially WTR.
  • Patient satisfaction was high, with favorable outcomes regarding visual function and optical phenomena.
  • The VLF FVR IOL demonstrates effective visual rehabilitation in pseudophakic patients.