Intraocular lenses. Histopathologic characteristics of a large series of autopsy eyes

Using electron microscopy, we examined an eye obtained at autopsy in which a C-loop intraocular lens had been implanted into the posterior chamber 2 years and 4 months prior to the patient’s death. The lens was affixed with the superior loop outside the capsular bag and the inferior loop within the capsular bag. The two ciliary epithelial layers to which the superior loop was attached were thinned; the pigmented epithelial layer was completely absent and the nonpigmented epithelial layer was disrupted, suggesting breakdown of the blood-aqueous barrier. Proliferating lens epithelial cells, basement membrane-like material, collagen fibers and microfibrils were seen surrounding the inferior loop. The lens capsule, the zonular fibers and the ciliary epithelium adjacent to the inferior loop showed no pathological changes.

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“…. b, 1985Champion et al, 1985]. These reports, how ever, were based entirely on light-microscop ic findings.…”

Section: Discussionmentioning

confidence: 99%

Posterior Chamber Lens Implantation: Histopathological Report of a Successful Case

et al. 1988

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“…Raul de Camargo Vianna Filho (1) Lincoln de Freitas (2) Norma Allemann (3) Ana Luísa Hofling de Lima (4) …”

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“…If this support does not exist, several surgical techniques may be used, such as IOL implantation in the anterior chamber, lenses with iris support, iris fixation lenses and transsclerally fixated lenses 1,2 . The purpose of this study was to assess, through UBM, if one of the transscleral fixation techniques was sufficiently consistent as to allow the same surgeon to be routinely able to place the haptics in the ciliary sulcus and if two fixation points were sufficient to avoid tilting of the optical part.…”

Section: Introductionmentioning

confidence: 99%

Biomicroscopia ultra-sônica na avaliação da posição das lentes intra-oculares em uma técnica de fixação escleral

Filho¹,

Freitas²,

Allemann³

et al. 2000

Arq. Bras. Oftalmol.

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Ultrasound biomicroscopy in the assessment of intraocular lens positioning in a transscleral fixation techniquePurpose: To assess, through ultrasound biomicroscopy (UBM), the positioning of intraocular lens (IOL) haptics as related to the ciliary sulcus by using a scleral fixation technique, as well as to evaluate if two fixation points are sufficient to avoid tilting of the lenses.Methods: Sixteen aphakic eyes underwent an IOL implantation by means of the same scleral fixation technique, performed by the same surgeon. One month after surgery, both the positioning of the IOL haptics and the distances between the IOLs and the cornea were assessed by UBM. Results were statistically studied.Results: Of the 32 intraocular lens haptics fixed to the sclera, eight were placed inside the ciliary sulcus and 24 were placed outside the ciliary sulcus. There was no statistical difference in the distances measured between the intraocular lenses and the cornea for the haptics placed outside the ciliary sulcus as compared to the haptics placed inside the ciliary sulcus, suggesting that other factors, besides the distance to the limbus, may be relevant in the positioning of haptics in the ciliary sulcus. The same measurements performed at 3, 6, 9, and 12 hours, on the periphery of the lenses, were also similar, suggesting that 2-point fixation is sufficient to avoid tilting of the lenses in the eye.Conclusions: Other factors (e.g. the ciliary sulcus opening angle), than the distance from the limbus where the sclera is transfixed, are important for the placement of the lenses in the ciliary sulcus. Two fixation points are sufficient to avoid tilting of the IOL in the eye. Biomicroscopia ultra-sônica na avaliação da posição das lentes intra-oculares em uma técnica de fixação escleralStudy sponsored by a CNPq fellowship.

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“…1992 ;110: [1124][1125][1126][1127] rphere are two sites for the posterior -* chamber intraocular lens (PCIOL) fixation, namely (1) given for local effect for 6 months. Indometacin was used only before surgery.…”

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confidence: 99%

Effect of Continuous Circular Capsulorhexis and Intraocular Lens Fixation on the Blood-Aqueous Barrier

Tsuboi¹

1992

Arch Ophthalmol

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Intraocular lenses. Histopathologic characteristics of a large series of autopsy eyes

Cited by 74 publications

References 81 publications

Posterior Chamber Lens Implantation: Histopathological Report of a Successful Case

Posterior Chamber Lens Implantation: Histopathological Report of a Successful Case

Biomicroscopia ultra-sônica na avaliação da posição das lentes intra-oculares em uma técnica de fixação escleral

Effect of Continuous Circular Capsulorhexis and Intraocular Lens Fixation on the Blood-Aqueous Barrier

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