Optical biometry features in silicon oil filled eyes

Background. The article presents results of axial length (AL) measurement in eyes filled with silicone oil and in those without silicone oil with IOLMaster and Lenstar LS 900 optical biometry methods. Materials and methods. The anteroposterior axis was measured in 27 eyes of 27 patients with silicone oil tamponade after surgical treatment of several vitreoretinal conditions. Using IOLMaster, the AL of eyes without silicone oil tamponade varied from 21.99 mm to 29.38 mm, Lenstar LS 900 biometry gave results from 21.96 mm to 29.41 mm. Results. According to data obtained and to their distribution, all cases were divided into 2 groups: I group — eyes with AL less than 23.63 mm, and II group — eyes with AL more than 23.63 mm. In the group II, the disparity of consecutive measurements was reliable and amounted to 0.28 ± 0.46 mm (р = 0.024) for IOLMaster and 0.23 ± 0.44 mm (р = 0.029) for Lenstar LS 900. Conclusion. So AL values at IOLMaster and Lenstar LS 900 biometry of silicone oil filled eyes may significantly overestimate the real ones when exceeding 23.63 mm. In case of simultaneous phacoemulsification with IOL implantation, this could lead to hypermetropic shift of postoperative refraction. Lenstar LS 900 measurement error in silicon oil filled eyes is less than that of IOLMaster, thus making the first biometry method preferable. In eyes with AL shorter than 23.63 mm, the measurement difference was not reliable, thus the biometry accuracy in silicone oil filled “short” eyes becomes higher.

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Long-term results of two-stage surgical treatment of patients with advanced proliferative diabetic retinopathy and complicated incipient cataract

Modern technologies in ophtalmology ◽

10.25276/2312-4911-2021-1-100-104 ◽

2021 ◽

pp. 100-104

Author(s):

K.I. Konovalova ◽

◽

M.M. Shishkin ◽

Keyword(s):

Diabetic Retinopathy ◽

Surgical Treatment ◽

Proliferative Diabetic Retinopathy ◽

Silicone Oil ◽

Vitreoretinal Surgery ◽

Long Term Results ◽

Oil Removal ◽

Iol Implantation ◽

Silicone Oil Tamponade

Purpose. To compare and evaluate long-term results of two-stage surgical treatment of patients with advanced proliferative diabetic retinopathy and complicated incipient cataract. Material and methods. 73 patients with advanced proliferative diabetic retinopathy and complicated incipient cataract performed by vitrectomy from 2016 to 2020 were analyzed. In the 1st group patients were subjected to a two-step surgical procedure: vitreoretinal surgery with silicone oil tamponade performed as the 1st step in their treatment; followed by the 2d step, phacoemulsification surgery and silicone oil removal, and the IOL implantation, respectively. In the 2d group phacoemulsification performed simultaneously with vitreoretinal surgery: phacoemulsification, IOL implantation, vitreoretinal surgery with silicone oil tamponade. The second step differed in the removal of silicone oil from the vitreous cavity. Results. Visual functions improved in 88.8% of cases in group 1, and in 51.3% in group 2. Conclusion. Outcomes of the studies suggest that it is more viable to perform phacoemulsification surgery sometime later along with silicone oil removal on PDR patients with complicated primary cataract. This sequence of treatment procedure ensures a more gentle approach to the anatomic structures of the eye during the first stage (vitreoretinal surgery) and contributes to the reduction in the number of intraoperative and postoperative complications. Key words: diabetic retinopathy, cataract, vitreoretinal surgery.

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Axial length measurements before and after removal of silicone oil: a new method to correct the axial length of silicone-filled eyes for optical biometry

Ophthalmic and Physiological Optics ◽

10.1111/j.1475-1313.2009.00636.x ◽

2009 ◽

Vol 29 (4) ◽

pp. 449-457 ◽

Cited By ~ 4

Author(s):

Kai Wang ◽

Meng-Ke Yuan ◽

Yan-Rong Jiang ◽

Yong-Zhen Bao ◽

Xiao-Xin Li

Keyword(s):

Axial Length ◽

Silicone Oil ◽

New Method ◽

Optical Biometry ◽

Length Measurements ◽

Before And After

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Changes of the level of pro- and anti-inflammatory cytokines in tear of patients with advanced proliferative diabetic retinopathy and complicated primary cataract depending on the volume vitreoretinal surgery

Modern technologies in ophtalmology ◽

10.25276/2312-4911-2021-3-82-86 ◽

2021 ◽

pp. 82-86

Author(s):

K.I. Konovalova ◽

◽

M.M. Shishkin ◽

Keyword(s):

Diabetic Retinopathy ◽

Inflammatory Cytokines ◽

Proliferative Diabetic Retinopathy ◽

Silicone Oil ◽

Vitreoretinal Surgery ◽

Second Step ◽

Iol Implantation ◽

Keywords Cytokines ◽

Silicone Oil Tamponade ◽

Anti Inflammatory

Purpose. The aim is to estimate the content of pro- and anti-inflammatory cytokines (IL-1β, IL-8, IL-10, MCP-1, ICAM-1, VEGF) in tear of patients with advanced proliferative diabetic retinopathy and complicated primary cataract after phacoemulsification surgery and IOL implantation with vitreoretinal surgery accomplished at once in comparison with vitreoretinal surgery only. Material and methods. 34 cases of surgery treatment of patients with PDR and complicated primary cataract were enrolled. This patients were divided into two groups depending on the treatment tactics. In the 1st group patients were subjected to a two–step surgical procedure: vitreoretinal surgery (VRS) with silicone oil tamponade performed as the 1st step in their treatment; followed by the 2nd step, phacoemulsification surgery and silicone oil removal, and the IOL implantation, respectively. In the 2nd group phacoemulsification performed simultaneously with vitreoretinal surgery: phacoemulsification, IOL implantation, vitreoretinal surgery with silicone oil tamponade. The second step differed in the removal of silicone oil from the vitreous cavity. On the 2nd day after the 1st step surgery and before surgical treatment the tear samples of the patients of both groups have been examined. Results. A concentration of the following cytokines: IL-8, MCP-1, ICAM-1 in the 2nd group was 2,5-5 times higher than in the 1st group. Conclusion. The research revealed that the patients with advanced PDR are accurately determined by the increased concentration of IL-8, MCP-1, ICAM-1 in tear after phacoemulsification surgery and IOL implantation with vitreoretinal surgery accomplished at once in comparison with vitreoretinal surgery only. Keywords: cytokines, diabetic retinopathy, cataract, vitreoretinal surgery.

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Differences in Axial Length and IOLs Power Basing on Alternative A-Scan or Fellow-Eye Biometry in Macular-Off Rhegmatogenous Retinal Detachment Eyes

10.21203/rs.3.rs-252317/v1 ◽

2021 ◽

Author(s):

Rui Liu ◽

Hongrong Li ◽

Qingchen Li

Keyword(s):

Retinal Detachment ◽

Axial Length ◽

Rhegmatogenous Retinal Detachment ◽

Silicone Oil ◽

Power Prediction ◽

Fellow Eye ◽

Lens Extraction ◽

Silicone Oil Tamponade ◽

The Mean ◽

The Difference

Abstract We observe the potential refractive error basing on alternative A-scan ultrasound and fellow-eye biometry for phacovitrectomy in phakic macula-off rhegmatogenous retinal detachment (RRD) eyes, when IOLMaster fails to obtain data. Vitrectomy without lens extraction was performed for RRD repair. Preoperative axial length was measured using alternative A-scan ultrasound (AL-US). Postoperative axial length in eyes with silicone oil tamponade (AL-SO) and fellow-eye biometry (AL-FE) were obtained using IOLMaster. AL-US, AL-FE and AL-SO were 25.39 ± 2.14 mm, 25.85 ± 2.16 mm and 26.08 ± 2.53 mm, respectively. The Bland-Altman agreements among AL-US, AL-FE and AL-SO were well (95.5%, 21/22 of cases were in LoA). The mean IOLs power calculated using AL-US (Power-US) was 16.81 ± 7.19 D, using AL-FE (Power-FE) was 14.74 ± 6.95 D, and using AL-SO (Power-SO) was 13.54 ± 8.32 D. The difference between AL-US and AL-SO was significant (P < 0.05), while that between AL-FE and AL-SO was not (P > 0.05). The difference between Power-US and Power-SO was significant (P < 0.05), while that between Power-FE and Power-SO was not (P > 0.05). It showed that the alternative A-scan ultrasound leads to significant differences in axial length and IOLs power prediction, while fellow-eye biometry provided similar measurements compared with those of silicone oil-filled eyes after RRD repair.

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Differences in Axial Length and IOLs Power Basing on Alternative A-Scan or Fellow-Eye Biometry in Macular-off Rhegmatogenous Retinal Detachment Eyes

10.21203/rs.3.rs-115392/v1 ◽

2020 ◽

Author(s):

Rui Liu ◽

Hongrong Li ◽

Qingchen Li

Keyword(s):

Retinal Detachment ◽

Axial Length ◽

Prediction Error ◽

Rhegmatogenous Retinal Detachment ◽

Silicone Oil ◽

Fellow Eye ◽

Lens Extraction ◽

Significant Difference ◽

Silicone Oil Tamponade ◽

The Difference

Abstract Background: To observe the potential refractive prediction error basing on alternative A-scan ultrasound and fellow-eye biometry for phacovitrectomy in macula-off rhegmatogenous retinal detachment (RRD) eyes, when the optic biometry IOLMaster fails to obtain data.Methods: Phakic macula-off RRD eyes without axial length (AL) measured using IOLMaster were included. Vitrectomy with silicone oil tamponade but not lens extraction was performed. Preoperative AL was measured using A-scan ultrasound, and postoperative AL, as well as fellow-eye biometry, was obtained using IOLMaster. The IOLs power was calculated according to preoperative A-scan, postoperative IOLMaster and fellow-eye AL.Results: AL measured by alternative A-scan (AL-US) was 25.39±2.14 mm, and AL of fellow-eyes (AL-FE) was 25.85±2.16 mm, and AL in eyes with silicone oil tamponade (AL-SO) was 26.08±2.53 mm. The Bland-Altman agreements among AL-US, AL-FE and AL-SO were well (95.5%, 21/22 of cases were in LoA). The mean IOLs power calculated using AL-US (Power-US) was 16.81±7.19 D, using AL-FE (Power-FE) was 14.74±6.95 D, and using AL-SO (Power-SO) was 13.54±8.32 D. The difference between AL-US and AL-SO was significant (P<0.05), while that between AL-FE and AL-SO was not (P>0.05). The difference between Power-US and Power-SO was significant (P<0.05), while that between Power-FE and Power-SO was not (P>0.05).Conclusion: The alternative A-scan ultrasound leads to a significant difference in AL and prediction error in IOLs power, while fellow-eye biometry provided similar results compared with those of silicone oil-filled eyes after RRD repair.

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Phacoemulsification of primary cataract by the second stage after vitreoretinal surgery of PDR patients.

Diabetes Mellitus ◽

10.14341/dm12256 ◽

2021 ◽

Vol 23 (5) ◽

pp. 452-458

Author(s):

Karina Igorevna Konovalova ◽

Mikhail Mikhailovich Shishkin ◽

Rinat Rustamovich Fayzrakhmanov

Keyword(s):

Silicone Oil ◽

Vitreoretinal Surgery ◽

Second Step ◽

Oil Removal ◽

Iol Implantation ◽

Second Stage ◽

Silicone Oil Removal ◽

Silicone Oil Tamponade ◽

Group 2 ◽

Group 1

BACKGROUND: The «gold standart» for surgical treatment of patients with proliferative diabetic retinopathy (PDR is vitreoretinal surgery. However, the question of the timing of the removal of primary cataract in this category of patients remains open.AIM: To evaluate the efficacy of phacoemulsification of primary cataract by the second stage after vitreoretinal surgery of PDR patientsMETHODS: 67 cases of surgery treatment of patients with PDR and complicated primary cataract were enrolled. This patients were divided into two groups depending on the treatment tactics. In the 1st group patients were subjected to a two–step surgical procedure: vitreoretinal surgery with silicone oil tamponade performed as the 1st step in their treatment; followed by the 2d step, phacoemulsifi tion surgery and silicone oil removal, and the IOL implantation, respectively. In the 2d group phacoemulsifi tion performed simultaneously with vitreoretinal surgery: phacoemulsification, IOL implantation, vitreoretinal surgery with silicone oil tamponade. The second step differed in the removal of silicone oil from the vitreous cavity.RESULTS: Visual functions improved in 88.6% of cases in group 1, and in 68.7% in group 2.CONCLUSIONS: Outcomes of the preliminary studies suggest that it is more viable to perform phacoemulsification surgery sometime later along with silicone oil removal on PDR patients with complicated primary cataract. This sequence of treatment procedure ensures a more gentle approach to the anatomic structures of the eye during the first stage (vitreoretinal surgery) and contributes to the reduction in the number of intraoperative and postoperative complications.

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Comparative analysis of morphological and functional methods of studying the condition of the central parts of the retina with relapse of macular rupture

Clinical Practice ◽

10.17816/clinpract25831 ◽

2020 ◽

Author(s):

Mikhail Mikhailovich Shishkin ◽

Eugenya Artemovna Larina ◽

Rinat Rustamovich Fayzrakhmanov ◽

Oleg Alexandrovich Pavlovsky ◽

Anna Victorovna Sukhanova ◽

...

Keyword(s):

Surgical Treatment ◽

Postoperative Period ◽

Silicone Oil ◽

Diagnostic Procedures ◽

Internal Limiting Membrane ◽

Early Postoperative Period ◽

Functional Parameters ◽

Functional Methods ◽

Silicone Oil Tamponade

in 8-10% of cases after surgical treatment, macular ruptures dont close. Objective: to assess the morphological and functional parameters of the macular area using the surgical method of closing previously operated macular ruptures using a free flap of the internal limiting membrane and silicone oil tamponade. This study involved 31 patients, all patients underwent surgical treatment according to the method using a free ILM flap and silicone tamponade, also the standard diagnostic procedures and optical coherence tomography and microperimetry were used (before the operation, on 14th and 30th day after the operation). A change of the morphological parameters of the retina has a direct correlation with a change of the functional parameters of the macular zone, and a peak of the increase in photosensitivity of the retina occurs in the early postoperative period with a slight increase in this indicator in the long-term postoperative period.

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Extrascleral Filling Using Endoillumination the First Experiencethe

Russian ophthalmology of children ◽

10.25276/2307-6658-2020-3-43-49 ◽

2020 ◽

pp. 43-49

Author(s):

V.Y. Markevich ◽

◽

T.A. Imshenetskaya ◽

O.A. Yarmak ◽

◽

...

Keyword(s):

Surgical Treatment ◽

Retinal Detachment ◽

Rhegmatogenous Retinal Detachment ◽

Silicone Oil ◽

Subretinal Fluid ◽

Crystalline Lens ◽

Vitreous Cavity ◽

Macular Area ◽

General Group ◽

Anatomical Outcome

Purpose. To study the effectiveness of extrascleral filling (ESF) using endoillumination in the surgical treatment of patients with primary rhegmatogenous retinal detachment (RRD). Material and methods. The material for the study was the data of a comprehensive clinical examination and surgical treatment by ESF method using endoillumination in 17 patients (17 eyes) with RRD. In 7 cases (41%), the macular area was involved in the detachment process. In 5 cases (29.4%), local scleral filling was performed. In the remaining 12 cases (70.6%), the local ESF was supplemented with a circling silicone element. Surgical intervention was supplemented by transscleral drainage of subretinal fluid (SRF) in 10 cases (59%) and pneumatic retinopexy with SF6 gas 50% in 8 cases (48%). Results. In the general group of patients, best corrected visual acuity (BCVA) increased from 0.35 to 0.46. In the subgroup of patients with a detached macular area, the positive dynamics is more pronounced, BCVA increased from 0.1 to 0.28. The progression of proliferative vitreoretinopathy caused the recurrence of retinal detachment in two patients (11.8%). Recurrences were diagnosed after 3 and 5 months, respectively. In both cases, a vitrectomy with tamponade of the vitreous cavity with silicone oil 5000 Cst was performed. The percentage of successful anatomical outcome after the first operation in our study was 82%. The percentage of successful achievement of the final anatomical result was 94%. In two cases, additional injection of SF6 gas into the vitreous cavity was required. Conclusion. This type of surgical treatment is an effective method of surgical treatment of patients with RRD. In our study, the successful anatomical outcome after the first operation was recorded in 82% of patients, which correlates with the data of the authors who also used this method (83–92%). Surgeons who performed surgical treatment using this technique in our study note improved workplace ergonomics when visualizing the fundus using an operating microscope and endoillumination compared with indirect ophthalmoscopy. Other teams of authors came to this conclusion as well. In our study, there were no complications associated with the introduction of a light pipe into the vitreous cavity (iatrogenic crystalline lens injury, endophthalmitis), which indicates the safety of this type of surgical treatment.

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