Intermediate Vision Following Monofocal IOL Implantation

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Optometry

Background:

• Monofocal intraocular lenses (IOLs) are commonly used for cataract surgery, primarily providing excellent distance vision.
• The intermediate visual function achieved with these IOLs has not been extensively studied.
• Understanding intermediate vision is crucial for patient satisfaction and functional independence.

Purpose of the Study:

• To investigate the intermediate visual outcomes following implantation of the Clareon monofocal intraocular lens (IOL).
• To assess the visual and refractive results, including intermediate visual acuity and spectacle independence.
• To evaluate patient satisfaction and subjective visual quality after surgery.

Main Methods:

• A prospective study included 63 eyes from 52 patients who received the Clareon monofocal IOL (CNA0T0 or CNA0T2-T6).
• Visual acuity (distance, intermediate, near) and refractive error were assessed at 4-6 and 12 weeks post-surgery.
• Patient satisfaction and subjective visual quality were measured using validated questionnaires.

Main Results:

• The average postoperative spherical equivalent was -0.17±0.40 D, with high accuracy in refractive targeting (82% within ±0.5 D).
• Average uncorrected intermediate visual acuity (UIVA) was 0.35±0.13 LogMAR, improving with more myopic refractive targets.
• 51.1% of bilaterally implanted patients achieved spectacle independence for intermediate tasks, compared to 31.2% of unilaterally implanted patients.

Conclusions:

• The Clareon monofocal IOL delivers excellent distance vision and contributes to spectacle independence for intermediate tasks.
• Refractive targets can be adjusted by surgeons to further optimize intermediate visual performance.
• This IOL offers a viable option for patients seeking good distance vision and improved intermediate function.