Indian Journal of Ophthalmology

OPHTHALMIC IMAGE
Year
: 2019  |  Volume : 67  |  Issue : 9  |  Page : 1477-

Ophthalmological signet ring sign by a glaucoma implant


Sunny Chi Lik Au, Simon Tak Chuen Ko 
 Department of Ophthalmology, Tung Wah Eastern Hospital, Hong Kong, HKSAR, Hong Kong

Correspondence Address:
Dr. Sunny Chi Lik Au
Department of Ophthalmology, 9/F, MO Office, Lo Ka Chow Memorial Ophthalmic Centre, Tung Wah Eastern Hospital, 19 Eastern Hospital Road, Causeway Bay
Hong Kong




How to cite this article:
Au SC, Ko ST. Ophthalmological signet ring sign by a glaucoma implant.Indian J Ophthalmol 2019;67:1477-1477


How to cite this URL:
Au SC, Ko ST. Ophthalmological signet ring sign by a glaucoma implant. Indian J Ophthalmol [serial online] 2019 [cited 2020 Oct 22 ];67:1477-1477
Available from: https://www.ijo.in/text.asp?2019/67/9/1477/265118


Full Text



A 58-year-old man with right eye uveitic glaucoma was successfully implanted an Ahmed valve (New World Medical, Rancho Cucamonga, CA, USA) to control his intraocular pressure. Glaucoma drainage device, with increasing popularity,[1] would show up on radiological imaging,[2] and be mistaken as foreign body,[3] especially with its size, superior location to the eye,[4] and heterogeneous radiodensity throughout. The Ahmed valve appears as a signet ring on computed tomography [Figure 1]. The difference in radiodensity of the polypropylene body from the remaining silicone part outlines its ring-shaped appearance. This is more obvious especially with 3D reconstruction [Figure 2], making it a signature of glaucoma implant.{Figure 1}{Figure 2}

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 The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.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

Nil.

Conflicts of interest

There are no conflicts of interest.

References

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