Vitrectomy Improves Contrast Sensitivity in Multifocal Pseudophakia With Vision Degrading Myodesopsia

Area of Science:

• Ophthalmology
• Visual Optics
• Medical Technology

Background:

• Multifocal intraocular lenses (MFIOL) are known to potentially degrade contrast sensitivity function (CSF).
• The specific impact of vitreous opacities on CSF in MFIOL recipients and the efficacy of vitrectomy remain unclear.

Purpose of the Study:

• To investigate the contribution of vitreous opacities to reduced CSF in patients with MFIOL.
• To evaluate the benefit of vitrectomy in improving vision and CSF in patients with MFIOL and symptomatic vitreous opacities.

Main Methods:

• A prospective, nonrandomized study involving 180 eyes (55 MFIOL, 60 monofocal intraocular lenses [MIOL], 65 phakic) with vitreous opacities.
• Quantitative ultrasonography (QUS) assessed vitreous structure, while visual acuity and CSF measured vision.
• Comparison between observation and vitrectomy groups, and pre- vs. postoperative outcomes.

Main Results:

• Vitreous echodensity was similar across lens groups, but CSF was significantly worse in MFIOL eyes.
• Patients undergoing vitrectomy showed higher vitreous echodensity and worse CSF compared to controls.
• Vitrectomy led to significant reductions in vitreous echodensity and substantial improvements in CSF across all eye types, including MFIOL.

Conclusions:

• MFIOL eyes exhibit reduced CSF, likely due to the combined effects of the lens and vitreous opacification.
• Limited vitrectomy effectively reduces vitreous opacities and improves CSF in all patients, including those with MFIOL.
• Patients with MFIOL experiencing vision-degrading myodesopsia may benefit from considering vitrectomy for improved visual function.