Capsular Tension Ring in the Management of Occult Lens Zonular Dehiscence in Infantile Glaucoma

Guo, Suqin; Wagner, Rudolph S; Forbes, Brian J.; Tannen, Bradford; Caputo, Anthony R.

doi:10.3928/01913913-20100719-07

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…It manifests with severe ocular pain, headache, elevated IOP, and shallow anterior chamber, which are similar to primary AAC. The eyes with lens subluxation induced AAC have no clinical signs of zonular weakness which appeared in the eyes with lens subluxation but without AAC [2]. Zonular dehiscence may be observed after full dilation of pupil by slit lamp examination, but it has a potential risk of incidental IOP elevation [3].…”

Section: Introductionmentioning

confidence: 99%

Comparisons of clinical characteristics of lens-subluxated eye with or without acute angle closure: A retrospective study

Lin

Qin

et al. 2019

Preprint

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BackgroundTo compare clinical characteristics of lens subluxation between eyes with or without acute angle closure (AAC).MethodsThis is a retrospective and case control study. Thirty-four cases with lens subluxation were recruited from 2015 to 2017. Patients with acute angle closure were assigned to the AAC group (n=17 eyes) and those without AAC were in the non-AAC group (n=17 eyes). Quantitative anterior segment was evaluated by ultrasound biomicroscopy (UBM). Axial length (AL) was measured with IOL master. All patients underwent lens extraction surgery and were followed up for 6 months. ResultsThe history of blunt trauma was accounted for 11 (64.7%) cases in the AAC group and 14 (82.3%) cases in the non-AAC group. Nine (52.9%) patients in the AAC group had LPI or SPI treatment history, and high intraocular pressure was recurred. The UBM analysis showed that the average central ACD of affected eyes in the AAC group was 1.75 mm, which was significantly shallower than the fellow eyes (2.39 mm, P < 0.05) or both eyes in the non-AAC group (affected eye 3.24mm vs fellow eye 3.81mm). Lens vault and AOD500 also showed a remarkable difference between affected eye than fellow eye (P < 0.001) in the AAC group. The both eyes in the AAC group presented a shorter AL and shallower anterior chamber, comparing with those in the non-AAC group. Besides, the affected eyes in the AAC group presented significantly higher LV. ConclusionsThe crowded anterior chamber structure and shorter AL might be an anatomic basis for the eye with lens subluxation induced AAC. Quantitative evaluation of these ocular structures to identify zonular compromise, increased LV and shorter AL are valuable for the diagnosis of lens subluxation induced AAC.

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Section: Introductionmentioning

confidence: 99%

Comparisons of clinical characteristics of lens-subluxated eye with or without acute angle closure: A retrospective study

Lin

Qin

et al. 2019

Preprint

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“…The most common causes of zonular insufficiency are pseudoexfoliation syndrome, trauma, previous ocular surgery (after vitrectomy), hypermature cataract and increased axial length [2][3][4][5][6]. Less common causes include Marfan's syndrome, homocystinuria, Weill-Marchesani syndrome, microspherophakia, retinitis pigmentosa, and intraocular neoplasms [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of the capsular tension ring on refractive outcome after phacoemulsification

Saadet¹,

Özçura²

2021

rjo

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Purpose: To evaluate how capsular tension rings (CTR) affect refractive outcomes following cataract extraction by phacoemulsification complicated by zonular instability. Study design: Retrospective. Methods: In a retrospective case-control study, the 29 eyes of 29 patients with CTRs were compared with the 29 eyes of patients without zonular instability following routine phacoemulsification, with mean arithmetic refractive prediction error (ArRPE) and mean absolute refractive prediction error (AbRPE) as primary outcome measures. Results: A comparison of eyes with and without CTRs according to the SRK/ T formula revealed no statistically significant difference in ArRPE (0.52 vs. 0.45 D, p = 0.570) or AbRPE (0.52 vs. 0.55 D, p = 0.799). Postoperative hypermetropic shift occurred in most cases in both groups, although the mean difference between eyes with CTR (22/ 29) and without CTR (25/ 29) was not statistically significant (p = 0.315). Conclusion: Implanting CTRs did not consistently affect refractive outcomes versus routine phacoemulsification. Results suggest that intraocular lens power can be calculated as usual when CTRs are used. Abbreviations: CTR = capsular tension ring, ArRPE = arithmetic refractive prediction errors, AbRPE = absolute refractive prediction errors, IOL = intraocular lens, WTW = white-to-white, ACD = anterior chamber depths, AL = axial lengths, RPE = refractive prediction error

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“…When the lens moves forward, it can lead to a decreased depth of the anterior chamber, even pupillary block, anterior chamber angle closure, or acute intraocular pressure rise [1,2]. For the eyes with AAC caused by lens subluxation, having no clinical signs of the zonular weakness, it is difficult to determine the zonular stability before surgery and these signs may be neglected in the clinical setting [3]. Zonular dehiscence may be observed after full dilation of the pupil by slit-lamp examination, but that entails the risk of incidental IOP elevation [4].…”

Section: Introductionmentioning

confidence: 99%

Comparisons of Ocular Anatomic Differences of Lens-Subluxated Eye with or without Acute Angle Closure: A Retrospective Study

Lin

Qin

Zhang

et al. 2020

Journal of Ophthalmology

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Purpose. To compare ocular anatomy differences of lens subluxation between eyes with or without acute angle closure (AAC). Methods. This is a retrospective and case-control study. Sixty cases with mild lens subluxation were recruited. Among them, 30 eyes with acute angle closure were assigned to the AAC group and 30 eyes without AAC were assigned to the non-AAC group. The anterior segment was quantitatively evaluated by ultrasound biomicroscopy (UBM). The axial length (AL) was measured with IOL Master. All patients underwent lens extraction surgery and were followed up for six months. Results. The history of blunt trauma accounted for 22 (73.3%) cases in the AAC group and 21 (70%) cases in the non-AAC group. Fifteen (50%) patients in the AAC group had iridotomy history, and high intraocular pressure recurred. The UBM analysis showed that the average central chamber depth of the affected eyes in the AAC group was 1.82 mm, which was significantly shallower than that in the fellow eyes (2.58 mm, P<0.05) or both eyes in the non-AAC group.Both eyes in the AAC group presented a shorter AL and shallower anterior chamber than the eyes in the non-AAC group. Conclusions. An asymmetrical anterior chamber between bilateral eyes is an important feature in lens subluxation-induced AAC. The crowded anterior chamber and shorter AL might be the anatomic basis for the eye with lens subluxation-induced AAC.

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Capsular Tension Ring in the Management of Occult Lens Zonular Dehiscence in Infantile Glaucoma

Cited by 4 publications

References 10 publications

Comparisons of clinical characteristics of lens-subluxated eye with or without acute angle closure: A retrospective study

Comparisons of clinical characteristics of lens-subluxated eye with or without acute angle closure: A retrospective study

Effect of the capsular tension ring on refractive outcome after phacoemulsification

Comparisons of Ocular Anatomic Differences of Lens-Subluxated Eye with or without Acute Angle Closure: A Retrospective Study

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