Comparison of visual performance between two aspheric monofocal intraocular lens models

Area of Science:

• Ophthalmology
• Optical Engineering
• Biomedical Engineering

Background:

• Evaluating intraocular lens (IOL) outcomes requires distinguishing between visual acuity, optical quality, and overall quality of vision.
• Objective and subjective tests are crucial for unbiased assessment of IOL performance.

Purpose of the Study:

• To compare the visual and optical quality of two distinct monofocal intraocular lens models.
• To evaluate patient satisfaction and functional outcomes associated with each IOL.

Main Methods:

• A prospective, randomized clinical study involving 60 patients implanted bilaterally with two aspheric IOLs (Group A: -0.27 μm SA, Group B: -0.20 μm SA).
• Assessment of visual outcomes included uncorrected and corrected distance visual acuity (UCVA/DCVA), scattering index, MTF cut-off, Strehl Ratio (SR), contrast sensitivity defocus curve (CSDC), and longitudinal chromatic aberration.
• Patient-reported outcomes were measured using the CatQuest-9SF questionnaire.

Main Results:

• Group A demonstrated statistically significant improvements in corrected distance visual acuity (DCVA) and Strehl Ratio (SR) compared to Group B.
• Significant differences were observed in contrast sensitivity defocus curves at various vergences and pupil sizes.
• Group A exhibited superior visual and optical quality, including lower longitudinal chromatic aberration, and higher patient satisfaction, particularly in reading television text.

Conclusions:

• Both tested monofocal intraocular lens models provide excellent visual and optical quality with high patient satisfaction.
• The intraocular lens in Group A showed a slight, statistically significant advantage in specific visual and optical performance metrics over the Group B model.