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Adaptive-Optics-Based Simulation of Astigmatism Effects on Visual Acuity with Enhanced Monofocal Intraocular Lenses
César Albarrán-Diego1, María García-Montero2, Inas Baoud Ould Haddi3
1Department of Optics, Optometry and Vision Science, Universitat de València, Burjassot, Spain.
Summary
Visual acuity declines with increasing astigmatism for enhanced monofocal intraocular lenses (IOLs). Astigmatism magnitude is the primary factor, with axis orientation and pupil size also affecting intermediate vision, but IOLs show similar tolerance.
Area of Science:
- Ophthalmology
- Optics
- Biomedical Engineering
Background:
- Cataract surgery often involves intraocular lens (IOL) implantation.
- Enhanced monofocal IOLs aim to improve visual acuity across various distances.
- Astigmatism can impact visual outcomes after IOL surgery.
Purpose of the Study:
- To evaluate how astigmatism magnitude and axis orientation affect visual acuity with two enhanced monofocal IOLs.
- To assess the influence of pupil size on visual performance with these IOLs.
- To compare the astigmatic tolerance of RayOne EMV and Tecnis Eyhance IOLs using adaptive optics simulation.
Main Methods:
- A prospective study involving 24 participants aged 50-69 years.
- Adaptive optics simulation was used to model two enhanced monofocal IOLs (RayOne EMV, Tecnis Eyhance).
- Induced hyperopic astigmatism was applied, and visual acuity was measured at distance and intermediate ranges under various pupil sizes.
Main Results:
- Visual acuity degraded with increasing astigmatism magnitude at both distance and intermediate ranges.
- Astigmatism axis orientation and pupil diameter significantly modulated intermediate visual acuity.
- No significant differences in visual acuity degradation or astigmatic tolerance were found between the two IOLs.
Conclusions:
- Visual acuity deteriorates with increasing hyperopic astigmatism for both tested enhanced monofocal IOLs.
- Cylinder magnitude is the primary determinant of visual acuity loss.
- Astigmatic tolerance is comparable between RayOne EMV and Tecnis Eyhance IOLs.
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