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Updated: Jul 20, 2026
07:06
Binocular Dynamic Visual Acuity in Eyeglass-Corrected Myopic Patients
Published on: March 29, 2022
Visual acuity and optical parameters in progressive-power lenses.
1Laboratorio de Optica, Department de Física, Universidad de Murcia, Murcia, Spain. villegas@um.es
Summary
Progressive-power lenses (PPLs) with mild aberrations maintain visual acuity (VA) in the corridor. Log_Vol_PSF effectively predicts VA through PPLs, correlating well with overall visual performance.
Area of Science:
- Ophthalmology and Vision Science
- Optical Engineering
- Optometry
Background:
- Progressive-power lenses (PPLs) are complex optical devices designed to correct presbyopia.
- Understanding the impact of lens aberrations and ocular aberrations on visual performance is crucial for PPL design and patient satisfaction.
Purpose of the Study:
- To investigate how astigmatism and higher-order aberrations in PPLs affect visual acuity (VA).
- To identify a reliable optical metric for assessing the visual performance of PPLs.
Main Methods:
- Wavefront aberrations of PPLs and human eyes were measured using a Hartmann-Shack (HS) sensor.
- Visual acuity (VA) was measured under the same optical conditions.
- Optical metrics including root mean square (RMS) error, Strehl ratio, and Log_Vol_PSF were calculated.
Main Results:
- Aberration coupling between PPLs and eyes equalized retinal image quality across lens zones.
- Minor aberrations (coma, trefoil, astigmatism) in the PPL corridor did not significantly impact VA.
- Increasing astigmatism in peripheral zones moderately reduced vision quality.
- Log_Vol_PSF of the combined eye-PPL system showed the highest correlation with VA.
Conclusions:
- Ocular aberrations mitigate differences in optical quality between PPL corridor and peripheral zones.
- VA through the PPL corridor is comparable to unaided vision and declines gradually peripherally.
- Log_Vol_PSF serves as a strong predictor of VA through PPLs, reflecting the overall optical system performance.
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