Clinical Evaluation of a Modified Light Transmission Short-Wavelength Filtering Intraocular Lens Compared to a
Daniel H Chang1, Vance M Thompson2, William C Christie3
1Empire Eye and Laser Center, Bakersfield, CA, USA.
Ophthalmology and Therapy
|April 18, 2023
Summary
This study compared a violet-light filtering intraocular lens (IOL) to a standard IOL, finding similar visual acuity and contrast sensitivity. The violet-light filtering IOL improved driving and reduced frustration with vision.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Optics
Background:
- Cataract surgery involves replacing the natural lens with an artificial intraocular lens (IOL).
- Evaluating the impact of specific IOL features, like violet-light filtering, on visual outcomes is crucial for patient care.
- Violet-light filtering IOLs aim to improve visual quality by selectively filtering light wavelengths.
Purpose of the Study:
- To compare the safety and efficacy of a violet-light filtering intraocular lens (IOL) against a standard colorless IOL.
- To assess visual acuity, contrast sensitivity, color vision, patient satisfaction, and vision-related quality of life.
Main Methods:
- A prospective, bilateral, randomized, comparative, patient/evaluator-masked multi-center clinical trial.
- 250 subjects underwent phacoemulsification cataract extraction and implantation with either violet-light filtering (ZESTIS ZV9003) or colorless (ZESTIS ZA9003) IOLs.
- Visual function and patient-reported outcomes were assessed 12 months postoperatively.
Main Results:
- No significant differences were observed in uncorrected or corrected distance visual acuity, contrast sensitivity, or color vision between the two IOL groups.
- The violet-light filtering IOL group reported statistically significant improvements in day driving, night driving, and reduced frustration with vision.
- Both IOLs demonstrated excellent visual acuity and contrast sensitivity with a low incidence of optical/visual symptoms.
Conclusions:
- Violet-light filtering IOLs offer comparable visual acuity and contrast sensitivity to standard IOLs.
- The violet-light filtering chromophore may provide benefits related to driving performance and visual satisfaction.
- The ZV9003 violet-light filtering IOL is a safe and effective option for cataract surgery, with potential advantages in specific visual tasks.
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