Two cases of Z syndrome with the Crystalens after uneventful cataract surgery

Yuen, Leonard; Trattler, William; Wachler, Brian S Boxer

doi:10.1016/j.jcrs.2008.05.061

Cited by 34 publications

(20 citation statements)

References 5 publications

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“…The options include multifocal intraocular lenses,2 which have been shown to achieve better outcomes than accommodative intraocular lenses,3,4 despite compromise in the light energy allocated to each focal point. Moreover, multifocal intraocular lenses do not decrease stereopsis, even though bifocal intraocular lens implantation simultaneously generates defocused and focused images on the retina 5.…”

Section: Introductionmentioning

confidence: 99%

Visual and refractive outcomes after implantation of a fully diffractive trifocal lens

Cochener¹,

Vryghem²,

Rozot³

2012

OPTH

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BackgroundThe purpose of this study was to record the visual outcomes of patients treated by six surgeons after implantation of a trifocal lens.MethodsThe setting for this study comprised six ophthalmology units and eye clinics in Belgium and France, with a coordinating center in France, and data management and statistical analysis in France and Belgium. Ninety-four eyes from 47 patients were implanted with a trifocal FineVision® intraocular lens by six surgeons. Monocular and binocular, uncorrected and best distance-corrected, and photopic and mesopic visual acuity was measured, as well as the defocus curve between +4 D and −4 D with best distance correction.ResultsNear and far monocular visual acuities were similar to the data published after bifocal intraocular lens implantation. Intermediate vision was improved, and was demonstrated by scores of near visual acuity as well as far visual acuity with defocus −1.5 D-add lens. Far vision is maintained in mesopic conditions.ConclusionThe trifocal intraocular lens provides good far, intermediate, and near visual acuity.

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Section: Introductionmentioning

confidence: 99%

Visual and refractive outcomes after implantation of a fully diffractive trifocal lens

Cochener¹,

Vryghem²,

Rozot³

2012

OPTH

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“…4), among others due to asymmetric fibrosis in the haptic region (Z-syndrome in Crystalens). 34 In summary, robust measurements of IOL tilt and decentration can be obtained from a Purkinje-like based analysis on a volumetric set of OCT anterior segment data. OCTbased corneal topography data along with those IOL alignment and eye rotation data from the Purkinje method and IOL geometry can be used in customized pseudophakic eye models allowing estimates of the optical quality and the factors contributing to optical degradation in these eyes.…”

Section: Discussionmentioning

confidence: 99%

Intraocular lens alignment from an en face optical coherence tomography image Purkinje-like method

et al. 2014

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Abstract. Measurement of intraocular lens (IOL) alignment implanted in patients in cataract surgery is important to understand their optical performance. We present a method to estimate tilt and decentration of IOLs based on optical coherence tomography (OCT) images. En face OCT images show Purkinje-like images that correspond to the specular reflections from the corneal and IOL surfaces. Unlike in standard Purkinjeimaging, the tomographic nature of OCT allows unequivocal association of the reflection with the corresponding surface. The locations of the Purkinje-like images are linear combinations of IOL tilt, IOL decentration, and eye rotation. The weighting coefficients depend on the individual anterior segment geometry, obtained from the same OCT datasets. The methodology was demonstrated on an artificial model eye with set amounts of lens tilt and decentration and five pseudophakic eyes. Measured tilt and decentration in the artificial eye differed by 3.7% and 0.9%, respectively, from nominal values. In patients, average IOL tilt and decentration from Purkinje were 3.30 AE 4.68 deg and 0.16 AE 0.16 mm, respectively, and differed on average by 0.5 deg and 0.09 mm, respectively, from direct measurements on distortion-corrected OCT images. Purkinje-based methodology from anterior segment en face OCT imaging provided, therefore, reliable measurements of IOL tilt and decentration.

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“…Development of posterior capsular opacification (PCO) can result in postoperative visual complaints irrespective of what type of IOL is used, however, different types of IOLs require different considerations. Accommodating IOLs are susceptible to gradual haptic deformation resulting from capsule fibrosis, culminating in the so-called ‘z-syndrome’ [32, 33]. In general, patients that have multifocal IOLs have higher sensitivity to minor degrees of postsurgical ametropia [34].…”

Section: Postoperative Refractive Errormentioning

confidence: 99%

Corrective techniques and future directions for treatment of residual refractive error following cataract surgery

Moshirfar

McCaughey

Santiago-Caban

2014

Expert Review of Ophthalmology

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Postoperative residual refractive error following cataract surgery is not an uncommon occurrence for a large proportion of modern-day patients. Residual refractive errors can be broadly classified into 3 main categories: myopic, hyperopic, and astigmatic. The degree to which a residual refractive error adversely affects a patient is dependent on the magnitude of the error, as well as the specific type of intraocular lens the patient possesses. There are a variety of strategies for resolving residual refractive errors that must be individualized for each specific patient scenario. In this review, the authors discuss contemporary methods for rectification of residual refractive error, along with their respective indications/contraindications, and efficacies.

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Two cases of Z syndrome with the Crystalens after uneventful cataract surgery

Cited by 34 publications

References 5 publications

Visual and refractive outcomes after implantation of a fully diffractive trifocal lens

Visual and refractive outcomes after implantation of a fully diffractive trifocal lens

Intraocular lens alignment from an en face optical coherence tomography image Purkinje-like method

Corrective techniques and future directions for treatment of residual refractive error following cataract surgery

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