Monovision versus Blended Vision for Presbyopia Correction: A Prospective Observational Study

Area of Science:

• Ophthalmology
• Vision Science

Background:

• Cataract surgery often requires visual correction for presbyopia.
• Monovision using bilateral monofocal intraocular lenses (IOLs) and blended vision are surgical options for presbyopia correction.

Purpose of the Study:

• To compare visual outcomes, quality of life, and patient satisfaction between monovision and blended vision strategies for presbyopia correction after cataract surgery.

Main Methods:

• A prospective observational study was conducted at a tertiary care ophthalmology center.
• 150 patients with bilateral cataracts chose between monovision (bilateral monofocal IOLs) or blended vision (trifocal IOL in dominant eye, monofocal IOL in non-dominant eye).
• Outcomes were assessed at 6 months postoperatively.

Main Results:

• Blended vision demonstrated a significantly broader depth of focus and higher NEI-VFQ25 scores compared to monovision.
• Blended vision achieved superior spectacle independence for all visual tasks and better stereoacuity.
• The blended vision group experienced a higher incidence of halos and reduced contrast sensitivity.

Conclusions:

• Blended vision offers a superior continuous range of vision, improved quality of life, and enhanced spectacle independence compared to monovision.
• While effective, blended vision may lead to increased dysphotopsia (visual disturbances) and decreased contrast sensitivity.