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 Table of Contents  
Year : 2021  |  Volume : 1  |  Issue : 3  |  Page : 449

Intracameral ‘Poké Ball' sign

Department of Vitreo Retina, Netralaya Superspeciality Eye Hospital, Ahmedabad, Gujarat, India

Date of Web Publication02-Jul-2021

Correspondence Address:
Dr. Kushal Delhiwala
Department of Vitreo Retina, Netralaya Superspeciality Eye Hospital, KD House, 1st Floor, Above Andhra Bank, Parimal Cross Roads, Ellisbridge, Ahmedabad - 380 006, Gujarat
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijo.IJO_3370_20

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How to cite this article:
Delhiwala K, Patel R, Khamar B. Intracameral ‘Poké Ball' sign. Indian J Ophthalmol Case Rep 2021;1:449

How to cite this URL:
Delhiwala K, Patel R, Khamar B. Intracameral ‘Poké Ball' sign. Indian J Ophthalmol Case Rep [serial online] 2021 [cited 2021 Oct 19];1:449. Available from: https://www.ijoreports.in/text.asp?2021/1/3/449/320074

'Poké Ball' (a device used to capture Pokémons in a game) symbol comprises red and white semicircles with a central button [Figure 1]a.[1],[2] Identical appearance was seen in right eye of a 29-year-old man, wherein hyperoleon in anterior chamber (AC) displaced large silicone oil bubble centrally [Figure 1]b and [Figure 1]c.[3] This oil bubble had migrated in AC before six months, following vitrectomy for retinal detachment associated with irido-lenticulo-retinochoroidal coloboma. Silicone oil bubble in AC resists emulsification compared to same in posterior segment probably due to difference in inertia and shear stress.[4] This may have contributed to 'Poké Ball' appearance.
Figure 1: (a) Schematic drawing of Poké Ball having two different colored (red and white) semicircles with central button. (b) Anterior segment photograph of right eye showing iridolenticular coloboma and emulsified silicone oil droplets (hyperoleon; upper semicircle) displacing a larger silicone oil bubble (button) centrally, resembling appearance of ‘Poké Ball'. (c) Magnified image

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  References Top

Wagner-Greene VR, Wotring AJ, Castor T, Kruger J, Mortemore S, Dake JA. Pokémon GO: Healthy or harmful? Am J Public Health 2017;107:35-6.  Back to cited text no. 1
Giambelluca D, Caruana G, Cannella R. The Poké Ball sign in mature ovarian cystic teratoma. Abdom Radiol 2020. doi: 10.1007/s00261-020-02608-1. Online ahead of print.  Back to cited text no. 2
Colantuono D, Souied E. Hyperoleon. N Engl J Med 2020;382:2146.  Back to cited text no. 3
Chan YK, Ng CO, Knox PC, Garvey MJ, Williams RL, Wong D. Emulsification of silicone oil and eye movements. Invest Ophthalmol Vis Sci 2011;52:9721-7.  Back to cited text no. 4


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