Assessment of Anterior Segment Changes in Pseudophakic Eyes, Using Ultrasonic Biomicroscopic Imaging, after Pars Plana Vitrectomy with Silicone Oil or Gas Tamponade

Unsal, Erkan; Eltutar, Kadir; Karini, Belma; Kizilay, Osman

doi:10.1155/2016/8303792

Cited by 4 publications

(3 citation statements)

References 25 publications

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“… 4 There is conflicting evidence as to the change in ACD in pseudophakic eyes following vitrectomy with the use of gas. One study has shown that in patients in which gas tamponade was used, the ACD was statistically significantly reduced, 9 while others have found no change in ACD when vitrectomy is performed regardless of the use of gas. 1 , 2 …”

Section: Discussionmentioning

confidence: 99%

Myopic shift in a pseudophakic eye with an accommodating IOL following vitrectomy with gas tamponade

Aker

Dowling

Halperin

2018

American Journal of Ophthalmology Case Reports

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PurposeTo report the case of a patient with Crystalens, an accommodating posterior-chamber intraocular lens (IOL), who experienced a myopic shift following subsequent vitrectomy with gas tamponade. We propose a hypothesis as to why this myopic shift occurred and analyze its validity based on current literature.ObservationsA patient had cataract surgery with implantation of a Crystalens AT-50AO +21D. Preoperative A-scan measured anterior chamber depth (ACD) to be 3.69 mm. The refraction was emmetropic following cataract surgery. Nine months later, the patient required pars plana vitrectomy with gas tamponade for a rhegmatogenous retinal detachment, followed by vitrectomy, membrane peel, and air/fluid exchange for epiretinal membrane. The retinal repair was anatomically successful, however, the patient experienced a −1.0 D myopic shift. ACD measurement following vitrectomy was 5.08 mm.Conclusions and importanceMyopic shift following vitrectomy with gas tamponade in pseudophakic eyes is widely reported. This patient's myopic shift was assumed due to anterior movement of the Crystalens caused by a gas bubble placed during retinal detachment repair as this is the prevailing theory in the literature [1]. However, a comparison of the patient's ACD measurements does not support the above hypothesis. Further study is needed to determine the mechanism of myopic shift seen in pseudophakic patients following vitrectomy, specifically those with gas.

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Section: Discussionmentioning

confidence: 99%

Myopic shift in a pseudophakic eye with an accommodating IOL following vitrectomy with gas tamponade

Aker

Dowling

Halperin

2018

American Journal of Ophthalmology Case Reports

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“…Studies that have explored this issue commonly use ultrasound biomicroscopy. The possible changes in the anterior segment are put in context with gas tamponade 26 . It is also clear that impacts on the anterior segment are higher in combined surgery 27 .…”

Section: Anterior Chamber Depthmentioning

confidence: 99%

Changes in the anterior segment of the eye following uncomplicated pars plana vitrectomy. A review

Kopecký

Němčanský

2019

BIOMED PAP

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Pars plana vitrectomy is currently the most common technique used in retinal surgery. Although primarily involving the posterior segment of the eye it also affects the anterior segment. As this is a less published topic, the aim of this paper was to review the literature on changes in the anterior segment after uncomplicated pars plana vitrectomy using data based literature search. The conclusions are that even in otherwise ophthalmologically healthy patients, complications may occur in the anterior segment. Surgeons need to pay utmost attention in glaucoma patients and in those with endothelial insufficiency who are at highest risk of complications. He/she must also correctly plan a potential cataract surgery if not already done earlier. From the literature, most of the changes in the anterior segment after uncomplicated PPV are found to be temporary.

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“…Pars plana vitrectomy (PPV) is considered a standard surgical approach in many vitreoretinal diseases. However, PPV can lead complications, some of which arise from the changes in anterior segment morphology [4]- [11].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Changes in Anterior Segment Morphology with Ultrasound Biomicroscopy after Vitrectomy without Use of Tamponade in Pseudophakic Eyes

Unsal¹,

Eltutar²

2016

OJOph

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Aim: In this study we investigated the changes in anterior segment morphology in pseudophakia patients that underwent ultrasound biomicroscopy (UBM) after pars plana vitrectomy (PPV) operation without use of tamponade. Method: Pseudophakic patients who undergo PPV were enrolled in this prospective study between October 2012 and April 2015. Study included patients in whom intraocular tamponade was not used during PPV operation. UBM measurements were performed both before and 10 days after the operation. Anterior chamber depth (ACD) was measured using axial images of anterior segment. Trabecular meshwork-iris angle (TIA), ciliary body thickness (CBT), sclera thickness (ST), trabecular meshwork-ciliary process distance (T-CPD), iris-ciliary processes distance (I-CPD), and iris thickness (IT) were measured at temporal quadrant based on radial section images of the angle. Values measured before and after the operation were statistically compared with each other. Results: This study included 30 patients (18 females, 12 males) that underwent an operation ultrasound biomicroscopy (UBM) after pars plana vitrectomy (PPV) operation without use of tamponade. Mean age was 69.6 ± 9.1 (55 -85) years. Eighteen operations occurred on the left eye whereas twelve operations occurred on the right eye. CBT1, CBT2, CBT Max, T-CPD, and I-CPD were significantly decreased after operation when compared with the values of baseline (before) (p = 0.018, p = 0.012, p = 0.001, p = 0.033, p = 0.015, respectively). Other evaluated parameters did not show statistically significant changes after the operation (p > 0.05). Discussion: PPV results in significant changes in ciliary body morphology together with changes in anterior segment parameters in pseudophakic cases.

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Assessment of Anterior Segment Changes in Pseudophakic Eyes, Using Ultrasonic Biomicroscopic Imaging, after Pars Plana Vitrectomy with Silicone Oil or Gas Tamponade

Cited by 4 publications

References 25 publications

Myopic shift in a pseudophakic eye with an accommodating IOL following vitrectomy with gas tamponade

Myopic shift in a pseudophakic eye with an accommodating IOL following vitrectomy with gas tamponade

Changes in the anterior segment of the eye following uncomplicated pars plana vitrectomy. A review

Evaluation of the Changes in Anterior Segment Morphology with Ultrasound Biomicroscopy after Vitrectomy without Use of Tamponade in Pseudophakic Eyes

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