scholarly journals A case involving an Ahmed™ glaucoma valve transferred from the vitreous into the anterior chamber of the eye with a silicone oil tamponade for the treatment of neovascular glaucoma

2013 ◽  
pp. 449
Author(s):  
Tetsuya Sugiyama ◽  
Miki ◽  
Mari Ueki ◽  
Shota Kojima ◽  
Tsunehiko Ikeda
Keyword(s):  
Anterior Chamber ◽  
Silicone Oil ◽  
Neovascular Glaucoma ◽  
Silicone Oil Tamponade

scholarly journals Tube Length Adjustment and Tube Trimming Technique in Refractory Glaucoma

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Iwan Soebijantoro ◽  
Nina Asrini Noor
Keyword(s):  
Anterior Chamber ◽  
Silicone Oil ◽  
Vitreoretinal Surgery ◽  
Vitreous Hemorrhage ◽  
Neovascular Glaucoma ◽  
Secondary Glaucoma ◽  
Tube Placement ◽  
Tube Length ◽  
Refractory Glaucoma ◽  
Fixed Drug

Secondary glaucoma may develop after vitreoretinal surgery as it is a known risk factor for its development. When the risk factors are more than one, for instance along with neovascular glaucoma (NVG), the secondary glaucoma may become recalcitrant and very difficult to manage. Surgical intervention is often warranted to control intraocular pressure (IOP) and prevent progressive glaucomatous damage in patients with refractory glaucoma, and glaucoma drainage implant may be preferred as the primary choice. We describe a patient who develop secondary glaucoma after vitrectomy and silicone oil (SO) injection due to unresolved vitreous hemorrhage in proliferative diabetic retinopathy (PDR) and subsequent NVG. Baerveldt glaucoma implant (BGI) was carried out and placed in the superotemporal quadrant with longer anterior chamber tube placement to prevent escape of SO through the tube. Qualified success was achieved with additional one fixed-drug combination (FDC). However, 3 years later, the tube was blocked by the iris tissue at the inferior edge of the pupil. Tube trimming was performed efficiently using a simple technique. The distal end of the tube was pulled out of the anterior chamber through a paracentesis just next to the tube entrance and trimmed to the appropriate length. More than a year after the surgery, IOP was still well controlled with the same FDC. Unfortunately, the visual acuity could not be recovered due to advanced PDR.

scholarly journals Measurement of Force Required for Anterior Displacement of Intraocular Lenses and Its Defining Parameters

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4593
Author(s):  
Mihoko Mochiji ◽  
Sachiko Kaidzu ◽  
Yoshihisa Ishiba ◽  
Yuji Matsuda ◽  
Masaki Tanito
Keyword(s):  
Pressure Gradient ◽  
Anterior Chamber ◽  
Silicone Oil ◽  
The Other ◽  
Intraocular Lenses ◽  
Vitreous Surgery ◽  
Junction Area ◽  
Anterior Displacement ◽  
Silicone Oil Tamponade ◽  
Displacement Force

Intraocular stability during or after cataract and glaucoma filtration surgeries and vitreous surgery with a gas/silicone oil tamponade might differ among intraocular lenses (IOLs). We used six different one-piece IOL models and measured the force that displaced the IOLs from the vitreous cavity to anterior chamber as a measure of stability against the pressure gradient between the anterior and posterior IOL surfaces. We measured IOL hardness, haptics junction area, and posterior IOL bulge to identify what determines the IOL displacement force. The KOWA YP2.2 IOL (1.231 mN) required significantly greater force than the HOYA XY1 (0.416 mN, p = 0.0004), HOYA 255 (0.409 mN, p = 0.0003), Alcon SN60WF (0.507 mN, p = 0.0010), and Nidek NS60YG (0.778 mN, p = 0.0186) IOLs; J&J ZCB00V IOL (1.029 mN) required greater force than the HOYA XY1 (p = 0.0032) and HOYA 255 (p = 0.0029) IOLs; the Nidek NS60YG IOL required greater force than the HOYA 255 (p = 0.0468) IOL. The haptics junction area was correlated positively with the IOL displacement force (r = 0.8536, p = 0.0306); the correlations of the other parameters were non-significant. After adjusting for any confounding effects, the haptics junction area was correlated significantly with the IOL displacement force (p = 0.0394); the IOL hardness (p = 0.0573) and posterior IOL bulge (p = 0.0938) were not. The forces that displace IOLs anteriorly differed among one-piece soft-acrylic IOLs, and the optics/haptics junction area was the major force determinant.

Treatment of the сomplications of long-term silicone oil tamponade in a patient with retinopathy of prematurity and recurrent retinal detachment

2021 ◽  
pp. 367-374
Author(s):  
A. Kolesnik ◽  
◽  
B. Malyugin ◽  
E. Pedanova ◽  
I. Gorshkov ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
Retinopathy Of Prematurity ◽  
Silicone Oil ◽  
Combined Treatment ◽  
Corneal Thickness ◽  
Functional Results ◽  
Vitreous Cavity ◽  
Silicone Oil Tamponade ◽  
The Right

Objective. To present the clinical and functional results of combined treatment of the complications of long-term silicone oil tamponade in a patient with retinopathy of premature. Materials and methods. A 24-year-old patient diagnosed with stage 4b retinopathy of premature in a single seeing right eye. Between 2011 and 2020 underwent 5 microinvasive revisions of the vitreous cavity with replacement of silicone oil and median duration of silicone oil tamponade of 19+25.5 months over this entire period. Because of the constant migration of emulsified silicone oil to anterior chamber due to weakness of iridolenticular ligaments, band keratopathy developed in the right eye, opacity of the IOL due to the adhesion of precipitates on its anterior and posterior surfaces, pupillary membrane, and aggravation of the proliferative membrane on the ocular surface. UCVA was proectio incerta and IOP was 17 mmHg. The median thickness of the cornea was 853 μm, the average thickness of the corneal calcifications is 57 μm. The patient underwent revision of the vitreous cavity with removal of the pupillary membrane, the next steps were to install bandage sutures in the anterior chamber parallel to iris in two mutually perpendicular surfaces to create additional barriers to silicone oil migration. Then we used 27 mg of K3-EDTA to produce 0.1% chelating solution and to remove corneal calcium deposits. Final stage was YAG – laser discision of precipitates from the IOL surfaces. Results. Postoperatively UCVA of the right eye in 1-month was 0.05, IOP was 17 mmHg and endothelial cell density was 1200 cells / mm2. According to OCT data the median corneal thickness was 640 μm, the thickness of the epithelial layer was 39 μm. Biomicroscopically, cornea was transparent, a single silicone oil vesicle in the lower segment of anterior chamver, the bandage sutures are consistent, the IOL is centered with a transparent optical zone, silicone oil visualized on the fundus, epi- and subretinal proliferates were delimited by laser coagulates, epiretinal membrane was in the macular region. Key words: retinopathy of prematurity, silicone oil, emulsification, ribbon-like keratopathy, bandage threads, EDTA.

scholarly journals Intracameral anti-VEGF injection for advanced neovascular glaucoma after vitrectomy with silicone oil tamponade

2021 ◽  
Vol 14 (3) ◽  
pp. 456-460
Author(s):  
Ling Bai ◽  
◽  
Yi-Dan He ◽  
Shu Zhang ◽  
Feng Wang ◽  
...  
Keyword(s):  
Silicone Oil ◽  
Time Window ◽  
Neovascular Glaucoma ◽  
Optimal Time ◽  
Intracameral Injection ◽  
Pan Retinal Photocoagulation ◽  
Before And After ◽  
Silicone Oil Tamponade ◽  
Retinal Photocoagulation

AIM: To evaluate the effect of intracameral injection of conbercept for the treatment of advanced neovascular glaucoma (NVG) after vitrectomy with silicone oil tamponade. METHODS: Conbercept 0.5 mg/0.05 mL was injected into the anterior chamber of 5 eyes, which had developed advanced NVG after vitrectomy with silicone oil tamponade. Then, trabeculectomy with mitomycin C and pan-retinal photocoagulation (PRP) or extra-PRP were conducted within 2d. The follow-up time was 6mo. Best-corrected visual acuity (BCVA), intraocular pressure (IOP), neovascularization of iris (NVI) were recorded before and after treatment. RESULTS: Within 2d after injection, IOP control, and NVI regression were optimal for trabeculectomy. Hyphema occurred in one eye in the process of injection. But none of them present hyphema after trabeculectomy. At the end of follow-up time, all eyes had improved BCVA, well-controlled IOP, and completely regressed NVI. CONCLUSION: Intracameral injection of conbercept is safe and effective in the treatment of patients with advanced NVG after vitrectomy with silicone oil tamponade. Within 2d after injection is the optimal time window for trabeculectomy, which can maximally reduce the risk of perioperative hyphema.

Management of a case of Enhanced S-cone syndrome with massive foveoschisis treated with pars plana vitrectomy with silicone oil tamponade

2021 ◽  
pp. 1-4
Author(s):  
Lorane Bechet ◽  
Raphaël Atia ◽  
Christina Zeitz ◽  
Saddek Mohand-Saïd ◽  
José-Alain Sahel ◽  
...  
Keyword(s):  
Pars Plana Vitrectomy ◽  
Silicone Oil ◽  
Pars Plana ◽  
Silicone Oil Tamponade ◽  
Enhanced S Cone Syndrome

CORRELATION BETWEEN QUANTITY OF SILICONE OIL EMULSIFIED IN THE ANTERIOR CHAMBER AND HIGH PRESSURE IN VITRECTOMIZED EYES

Retina ◽  
2002 ◽  
Vol 22 (4) ◽  
pp. 443-448 ◽  
Author(s):  
TERESIO AVITABILE ◽  
VINCENZA BONFIGLIO ◽  
ADELAIDE CICERO ◽  
BENEDETTO TORRISI ◽  
ALFREDO REIBALDI
Keyword(s):  
High Pressure ◽  
Anterior Chamber ◽  
Silicone Oil

Comparison of the parameters of retinal sensitivity after vitrectomy due to rhegmatogenous retinal detachment

2021 ◽  
pp. 349-354
Author(s):  
R.R. Fayzrakhmanov ◽  
◽  
A.V. Sukhanova ◽  
O.A. Pavlovsky ◽  
E.D. Bosov ◽  
...  
Keyword(s):  
Retinal Detachment ◽  
Rhegmatogenous Retinal Detachment ◽  
Silicone Oil ◽  
Light Sensitivity ◽  
Control Group ◽  
Strong Positive Correlation ◽  
Gas Tamponade ◽  
Group I ◽  
Silicone Oil Tamponade ◽  
Group Ii

Purpose. To compare the parameters of a light sensitivity (LS) of the central zone of a retina after vitrectomy due to reghmatogenous retinal detachment (RRD) with a silicone oil tamponade (SOT) and gas tamponade (GT). Material and methods. The study included 20 eyes after pars plana vitrectomy due to macula-off rhegmatogenous retinal detachment (RRD) by 25G. All patients were divided in 2 groups depending on the choice of the tamponade. The group I (10 eyes) included cases with the silicone oil tamponade (SOT) (1300 cSt), in the group II (10 eyes) – the gas tamponade (GT) (C2F6). The control group included contralateral eyes without ophthalmic pathology. All patients underwent standard ophthalmological examination and fundus- microperimetry (FMP) on the 30th day after removal of the SOT for the group I, or on the 30th day after the C2F6 tamponade for the group II. Results. According to FMP data, the parameter of average light sensitivity (LS) in the group I was significantly reduced, both in comparison with the group II (p=0.007) and the control group (p=0.003). Differentiation by zones in the group I revealed a decrease in each analyzed parameter in comparison with the control group (p<0.05) and a decrease in the 2nd zone (p=0.031) and the 4th zone (p=0.038) in comparison with the group II. In the 1st zone of the group I the formation of a relative scotoma was revealed in 4 cases out of 10 (40%). The parameters of light sensitivity (LS) in comparison with the control in the group II were significantly reduced when analyzed in each zone (p<0.05). A strong positive correlation was found between the Best Corrected Visual Acuity (BCVA) and the average LS in the group II (r=0.87). Conclusion. There is a decrease in the functional parameters of the retina with SOT compared with GT in the form of a decrease in the LS parameter in the 10° zone according to FMP data. Key words: retinal detachment, photosensitivity, microperimetry, silicone tamponade.

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