Personalized Pseudophakic Model for Refractive Assessment

Ribeiro, Filomena; Castanheira–Dinis, A.; Dias, J. M.

doi:10.1371/journal.pone.0046780

Cited by 20 publications

(14 citation statements)

References 35 publications

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“…Surgical procedures were conducted by the same experienced surgeon (FR) under local anesthesia through a microincision of 2.2 mm. Prior to surgery, patients underwent a comprehensive ophthalmological examination including optical biometry and anterior surface optical tomography for the calculation of the power of the IOL using a semicustomized ray-tracing method [ 21 ]. Surgical procedures with IOL implantation were conducted with a difference of 7 days between eyes.…”

Section: Methodsmentioning

confidence: 99%

Through-Focus Vision Performance and Light Disturbances of 3 New Intraocular Lenses for Presbyopia Correction

Escandón-Garcia

Ribeiro

McAlinden

et al. 2018

Journal of Ophthalmology

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Purpose To compare the through-focus visual performance in a clinical population of pseudophakic patients implanted with two new trifocal intraocular lenses (IOLs) and one extended depth of focus IOL. Methods Prospective, nonrandomized, examiner-masked case series. Twenty-three patients received the FineVision® and seven patients received the PanOptix™ trifocal IOLs. Fifteen patients received the Symfony extended depth of focus IOL. Mean age of patients was 63 ± 8 years. Through-focus visual acuity was measured from –3.00 to +1.00 D vergences. Contrast sensitivity was measured with and without a source of glare. Light disturbances were evaluated with the Light Distortion Analyzer. Results Though-focus evaluation showed that trifocal IOLs performed significantly better at near distance (33 and 40 cm), and extended depth of focus performed significantly better at intermediate distance (1.0 m). Contrast sensitivity function with glare and dysphotopsia was similar between the three IOLs and subjective response to questionnaire showed a significantly higher score (worse performance) for the extended depth of focus IOL compared to both trifocal IOLs in the bothersome subscale (p < 0.05). Conclusions Trifocal IOLs grant better performance at near distance while extended depth of focus IOL performs better at intermediate distance. Objective dysphotopsia measured with the Light Distortion Analyzer is not reduced in extended depth of focus IOL compared to trifocal IOLs.

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Section: Methodsmentioning

confidence: 99%

Through-Focus Vision Performance and Light Disturbances of 3 New Intraocular Lenses for Presbyopia Correction

Escandón-Garcia

Ribeiro

McAlinden

et al. 2018

Journal of Ophthalmology

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“…Characterization of corneal topography is critical for the assessment of vision quality and for several clinical applications including the diagnosis and management of corneal diseases [1] – [3] , the planning of refractive surgery [4] – [5] , and the construction of corneal numerical models [6] .…”

Section: Introductionmentioning

confidence: 99%

Geometrical Custom Modeling of Human Cornea In Vivo and Its Use for the Diagnosis of Corneal Ectasia

et al. 2014

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AimTo establish a new procedure for 3D geometric reconstruction of the human cornea to obtain a solid model that represents a personalized and in vivo morphology of both the anterior and posterior corneal surfaces. This model is later analyzed to obtain geometric variables enabling the characterization of the corneal geometry and establishing a new clinical diagnostic criterion in order to distinguish between healthy corneas and corneas with keratoconus.MethodThe method for the geometric reconstruction of the cornea consists of the following steps: capture and preprocessing of the spatial point clouds provided by the Sirius topographer that represent both anterior and posterior corneal surfaces, reconstruction of the corneal geometric surfaces and generation of the solid model. Later, geometric variables are extracted from the model obtained and statistically analyzed to detect deformations of the cornea.ResultsThe variables that achieved the best results in the diagnosis of keratoconus were anterior corneal surface area (ROC area: 0.847, p<0.000, std. error: 0.038, 95% CI: 0.777 to 0.925), posterior corneal surface area (ROC area: 0.807, p<0.000, std. error: 0.042, 95% CI: 0,726 to 0,889), anterior apex deviation (ROC area: 0.735, p<0.000, std. error: 0.053, 95% CI: 0.630 to 0.840) and posterior apex deviation (ROC area: 0.891, p<0.000, std. error: 0.039, 95% CI: 0.8146 to 0.9672).ConclusionGeometric modeling enables accurate characterization of the human cornea. Also, from a clinical point of view, the procedure described has established a new approach for the study of eye-related diseases.

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“…To consider all the potential applications of raytracing for IOL power calculation, the development of new pseudophakic eye models is warranted. 54 …”

Section: Preoperative Evaluation For Toric Intraocular Lens Implantatmentioning

confidence: 99%

<p>How Can We Improve Toric Intraocular Lens Calculation Methods? Current Insights</p>

Ferreira¹,

Ribeiro²

2020

OPTH

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Personalized Pseudophakic Model for Refractive Assessment

Cited by 20 publications

References 35 publications

Through-Focus Vision Performance and Light Disturbances of 3 New Intraocular Lenses for Presbyopia Correction

Through-Focus Vision Performance and Light Disturbances of 3 New Intraocular Lenses for Presbyopia Correction

Geometrical Custom Modeling of Human Cornea In Vivo and Its Use for the Diagnosis of Corneal Ectasia

<p>How Can We Improve Toric Intraocular Lens Calculation Methods? Current Insights</p>

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