Akkommodatives Linsenimplantat

Pr, Preussner; Wahl, Joachim; Gerl, R; Kreiner, C. F.; Serester, Alexander

doi:10.1007/s003470170208

Cited by 12 publications

(7 citation statements)

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“…This holds potential for at least some amount of accommodative optic shift especially in conjunction with a magnetdriven active-shift mechanism. 35 Future studies will address the following:…”

Section: Routine Posterior Buttonholing To Prevent Pcomentioning

confidence: 99%

Routine posterior optic buttonholing for eradication of posterior capsule opacification in adults

Menapace

2006

Journal of Cataract and Refractive Surgery

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Posterior optic buttonholing precludes lens epithelial cells from accessing the retrolental space. The sandwiched posterior capsule blocks optic contact and thus fibrosis of the anterior capsule. Posterior optic buttonholing avoids after-cataract independent of optic edge design. Anterior capsule polishing adds to its efficacy by excluding any residual fibrosis. Surgery under topical anesthesia was well-controlled and safe. Posterior optic buttonholing may become a routine alternative to standard in-the-bag IOL implantation when supported by a longer follow-up.

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Section: Routine Posterior Buttonholing To Prevent Pcomentioning

confidence: 99%

Routine posterior optic buttonholing for eradication of posterior capsule opacification in adults

Menapace

2006

Journal of Cataract and Refractive Surgery

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“…Preussner proposed using repulsing micro-magnets as a driving force [70]. Two magnets are placed at 3 and 9 o'clock within the capsular bag periphery, while a pair of repulsing twin magnets are sutured under the superior and the inferior rectus muscle insertions (Fig.…”

Section: Magnet-driven Active-shift Iolsmentioning

confidence: 99%

Accommodating intraocular lenses: a critical review of present and future concepts

Menapace

Findl

Kriechbaum

et al. 2006

Graefe's Arch Clin Exp Ophthalmol

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As opposed to psychophysical evaluation techniques, laser interferometry measures what shift lenses are designed to provide: axial shift on accommodative effort. While under pilocarpine some movement was recorded, no movement at all was found under near-point stimulation with any of the lenses currently marketed. In contrast, magnetic-driven active-shift lens systems carry the potential of sufficiently topping up apparent accommodation to provide for clinically useful accommodation while using conventional lens designs with proven after-cataract performance. Dual optic implants significantly increase the impact of axial optic shift. The main potential problem, however, is delayed formation of interlenticular regenerates. Lens refilling procedures offer the potential of fully restoring accommodation due to the great impact of increase in surface curvature on refractive lens power. However, various problems remain to be solved before clinical use can be envisaged, above all, again, after-cataract prevention. The concept of passive single-optic shift lenses has failed. Concomitant poor capsular bag performance makes these lenses an unacceptable trade-off. Magnet-assisted systems potentially combine clinically useful accommodation with satisfactory after-cataract performance. Dual optic lenses theoretically offer substantial accommodative potential but may allow for interlenticular after-cataract formation. Lens refilling procedures have the greatest potential for fully restoring natural accommodation, but will again require years of extensive laboratory and animal investigations before they may function in the human eye.

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“…One interesting design based on these ideas uses small magnets at the 3 and 9 o'clock positions mounted on a ‘capsular tension ring’ within the periphery of the capsular bag, and two similarly positioned pairs of repulsing magnets sutured under the superior and inferior rectus muscle insertions. The poles of the magnets are oriented to produce repulsive forces between the capsular and external magnets . A standard single‐optic, open‐loop IOL is placed posterior to the tension ring.…”

Section: Dynamic (Active) Corrections: ‘Restoring’ Accommodationmentioning

confidence: 99%

Developments in the correction of presbyopia II: surgical approaches

Charman

2014

Ophthalmic Physiologic Optic

114

109

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Purpose: To discuss the various static and dynamic surgical approaches which attempt to give presbyopes good vision at far, intermediate and near viewing distances. Content: Static methods broadly adopt the same optical techniques as those used in presbyopic contact lens correction and aim to satisfy the needs of the presbyope by increasing binocular depth-of-focus, often using monovision as well as simultaneous-imagery. Dynamic methods generally attempt to make use of at least some of the still-active elements of the accommodation system. They include procedures which are supposed to modify the relative geometry of the ciliary muscle and lens, or which reduce the stiffness of the presbyopic lens either by replacing it with other natural or man-made material or by subjecting it to femtosecond laser treatment. Alternatively the natural lens may be replaced by some form of intraocular lens which changes power as a result of forces derived from the still-active ciliary muscle, zonule and capsule, or other sources. Conclusions: At present, multifocal intraocular lenses appear to offer the most consistent and reliable surgical approach to surgical presbyopic correction. They have obvious advantages in convenience and stability over optically-similar, simultaneous-image presbyopic contact lenses but this must be balanced against their relative inflexibility in cases of patient dissatisfaction. Dynamic methods remain largely experimental. Although some approaches show promise, as yet no method has demonstrated a reliable, long-term ability to correct distance refractive error and to appropriately change ocular power in response to changes in viewing distance over the normal range of interest.

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Akkommodatives Linsenimplantat

Abstract: The implant described appears to be practicable with justifiable technical and surgical efforts.

Cited by 12 publications

References 0 publications

Routine posterior optic buttonholing for eradication of posterior capsule opacification in adults

Routine posterior optic buttonholing for eradication of posterior capsule opacification in adults

Accommodating intraocular lenses: a critical review of present and future concepts

Developments in the correction of presbyopia II: surgical approaches

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