Effect of age, decentration, aberrations and pupil size on subjective image quality with concentric bifocal optics

Rio, David; Woog, Kelly; Legras, Richard

doi:10.1111/opo.12300

Cited by 19 publications

(18 citation statements)

References 34 publications

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“…Subjects wore their sphero‐cylindrical prescription on one eye as well as a 3‐mm pupil in order to limit the influence of their aberrations while the fellow eye was occluded. The use of a 3‐mm artificial pupil has been extensively used in the literature . The artificial pupil was centred by subjects to maximise the perceived contrast of an acuity chart and was placed between the subjects’ eye and their sphero‐cylindrical prescription, as close to the eye as possible.…”

Section: General Methodsmentioning

confidence: 99%

“…In previous studies, we identified several bifocal optical profiles giving good subjective image quality scores for presbyopia correction using simulated images and subjective gradations. The first study goal was to find the best ratio between near and distance area on a 2 zone optical profile to maximise the subjects perceived image quality.…”

Section: Introductionmentioning

confidence: 99%

“…The profile with eight zones provided good image quality for distance, near and intermediate proximities thanks to diffraction phenomenon occurring when increasing the number of zones. The third study included the profile from the first study and the five and eight zone profiles. When augmenting the number of zones, interferences appear due to diffraction phenomenon .…”

Section: Introductionmentioning

confidence: 99%

“…The third study included the profile from the first study and the five and eight zone profiles. When augmenting the number of zones, interferences appear due to diffraction phenomenon . What happens is that there are constructive interferences at intermediate vergences, whereas we obtain destructive interferences at distance and near vergences.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of commercial vs theoretically optimised contact lenses for presbyopia

Legras

Rio

2017

Ophthalmic Physiologic Optic

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Purpose: To compare theoretically optimised bifocal contact lens optical designs to commercially available optical designs for presbyopia. Methods: Retinal images were simulated, using a numerical eye model, from -6 (i.e., near vision) to +2 D for each 0.25 D. Ten optical profiles were simulated. Four of them corresponded to commercial contact lenses (i.e., Acuvue Oasys for Presbyopiaâ, Air Optix Aqua Multifocalâ, Purevision Multifocalâ and Distance Biofinity Multifocalâ). We also included six optimised profiles: (1) a combination of primary and secondary spherical aberration, (2) bifocal profiles with 2, 5 and 8 concentric zones, and (3) a combination of spherical aberrations with the 5 and 8 zones profiles. Twenty subjects scored the quality of vision of calculated images (i.e., three high-contrast 0.40 logMAR letters) for each design and vergence with a five-item continuous grading scale. They viewed these images through their best sphero-cylindrical correction and a 3-mm pupil to limit the impact of their aberrations. To quantify the ability of a bifocal optic to maintain a certain level of quality of vision, we calculated two criteria: (1) the area under the through-focus quality of vision curve higher than 2 (i.e., limit between poor and fair quality of vision) normalised by the same area calculated on the naked eye's curve, and (2) the width of the curve at a level of 2 (i.e., depth-of-focus). Results: Commercial contact lens profiles did not give an image quality and depth-of-focus as good as the theoretically optimised optical profiles. Based on these two criteria, the best bifocal profiles were those with 5 and 8 concentric zones. Important inter-individual variations were observed for all profiles. We also observed that some subjects did not obtain any benefit with all the designs whereas others seemed to be satisfied whatever the optical profiles. Conclusion: Our previously optimised designs with 5 and 8 zones gave the best benefit and depth-of-focus. As their image quality is better than commercially available designs, it would be interesting to prototype these designs and to test them in a clinical setting.

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Section: General Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simulation of commercial vs theoretically optimised contact lenses for presbyopia

Legras

Rio

2017

Ophthalmic Physiologic Optic

Self Cite

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“…19 Given that IPD is influenced by ethnicity, sex, and age, it would appear prudent that these characteristics be identified within research to avoid inconsistent results due to potential confounding variables. Pupil diameter has also shown to vary based on age, 20,21 sex, 22 and ethnicity. 23 …”

Section: Introductionmentioning

confidence: 99%

The Reliability, Validity, and Normative Data of Interpupillary Distance and Pupil Diameter Using Eye-Tracking Technology

Murray

Hunfalvay²,

Bolte

2017

Trans. Vis. Sci. Tech.

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PurposeThe purpose of this study was to determine the reliability of interpupillary distance (IPD) and pupil diameter (PD) measures using an infrared eye tracker and central point stimuli. Validity of the test compared to known clinical tools was determined, and normative data was established against which individuals can measure themselves.MethodsParticipants (416) across various demographics were examined for normative data. Of these, 50 were examined for reliability and validity. Validity for IPD measured the test (RightEye IPD/PD) against the PL850 Pupilometer and the Essilor Digital CRP. For PD, the test was measured against the Rosenbaum Pocket Vision Screener (RPVS). Reliability was analyzed with intraclass correlation coefficients (ICC) between trials with Cronbach's alpha (CA) and the standard error of measurement for each ICC. Convergent validity was investigated by calculating the bivariate correlation coefficient.ResultsReliability results were strong (CA > 0.7) for all measures. High positive significant correlations were found between the RightEye IPD test and the PL850 Pupilometer (P < 0.001) and Essilor Digital CRP (P < 0.001) and for the RightEye PD test and the RPVS (P < 0.001).ConclusionsUsing infrared eye tracking and the RightEye IPD/PD test stimuli, reliable and accurate measures of IPD and PD were found. Results from normative data showed an adequate comparison for people with normal vision development.Translational RelevanceResults revealed a central point of fixation may remove variability in examining PD reliably using infrared eye tracking when consistent environmental and experimental procedures are conducted.

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Keeping an eye on cost: What can eye tracking tell us about attention to cost information in discrete choice experiments?

Genie

Ryan

Krucien³

2023

Health Economics

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Effect of age, decentration, aberrations and pupil size on subjective image quality with concentric bifocal optics

Cited by 19 publications

References 34 publications

Simulation of commercial vs theoretically optimised contact lenses for presbyopia

Simulation of commercial vs theoretically optimised contact lenses for presbyopia

The Reliability, Validity, and Normative Data of Interpupillary Distance and Pupil Diameter Using Eye-Tracking Technology

Keeping an eye on cost: What can eye tracking tell us about attention to cost information in discrete choice experiments?

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