|Year : 2018 | Volume
| Issue : 8 | Page : 1184-1185
Artifact in swept source optical coherence tomography due to silicone oil
Sumit Randhir Singh, Jay Chhablani
Smt. Kanuri Santhamma Centre for Vitreo-Retinal Diseases, L. V. Prasad Eye Institute, Hyderabad, Telangana, India
|Date of Submission||04-Mar-2018|
|Date of Acceptance||18-Apr-2018|
|Date of Web Publication||23-Jul-2018|
Dr. Jay Chhablani
Smt. Kanuri Santhamma Centre for Vitreo-Retinal Diseases, L. V. Prasad Eye Institute, Banjara Hills, Hyderabad - 500 034, Telangana
Source of Support: None, Conflict of Interest: None
Keywords: Rhegmatogenous retinal detachment, sandwich technique, silicone oil, swept source optical coherence tomography
|How to cite this article:|
Singh SR, Chhablani J. Artifact in swept source optical coherence tomography due to silicone oil. Indian J Ophthalmol 2018;66:1184-5
|How to cite this URL:|
Singh SR, Chhablani J. Artifact in swept source optical coherence tomography due to silicone oil. Indian J Ophthalmol [serial online] 2018 [cited 2020 May 24];66:1184-5. Available from: http://www.ijo.in/text.asp?2018/66/8/1184/237327
Silicone oil (polydimethylsiloxane) is one of the most commonly used intraocular tamponade agents in ophthalmic practice., Optical coherence tomography (OCT) has been used to study the vitreoretinal interface or retinal changes in these oil-filled eyes. One of the common artifacts seen in these eyes is the presence of a crescentic hyperreflective focus above the fovea which represents the interface between posterior margin of silicone oil and retinal surface. However, in our case, due to approximation in the peripheral retina, silicone oil led to an artifactual displacement of the retina on the scan, although the interface focus is not seen due to lack of space between the retina and oil meniscus.
| Case Report|| |
We have devised a novel surgical sandwich technique in which a combination of C3F8 and silicone oil is used. This has the benefit of providing intraocular tamponade to both superior and inferior retina due to gas and silicone oil, respectively. With time, as the gas bubble recedes, the chorioretinal adhesion usually forms, i.e., by 2 weeks. This technique finds usefulness in cases with inferior retinal detachments to reduce the recurrence rates.
The patient was a 69-year-old male who underwent a retinal detachment repair using sandwich technique – a combination of silicone oil (1000cs) and intraocular gas (14% C3F8). [Figure 1] at 1-month postoperative visit, color fundus photograph (a) and red free image (b) showed the presence of half-filled silicone oil superiorly (arrow) with attached retina. Horizontal swept source OCT scan (c) was without any artifact; however, vertical scan (d) showed an artifact, apparent posterior displacement of retinal layers (arrow) at the area of silicone oil. The half-filled silicone oil superiorly and the aqueous milieu inferiorly provide two mediums with different refractive indices leading to the origin of this artifact.
|Figure 1: Figure shows a color fundus photograph (a) and red free image (b) showing attached retina with half oil filled globe. Arrow in image (a) represents the silicone oil meniscus. Swept source optical coherence tomography horizontal scan (c) passing through disc and macula (below the silicone oil meniscus) showed retinal layers with altered foveal contour. Vertical scan (d) however showed the presence of posteriorly displaced retinal layers (arrow) in area corresponding to silicone oil|
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| Conclusion|| |
Clinician should be aware of potential artifacts on OCT in silico ne oil-filled eyes
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
| References|| |
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Oster SF, Mojana F, Bartsch DU, Goldbaum M, Freeman WR. Dynamics of the macular hole-silicone oil tamponade interface with patient positioning as imaged by spectral domain-optical coherence tomography. Retina 2010;30:924-9.