A 34-year-old male presented to the emergency department after being subdued by police with a TASER gun. On examination, the patient had a TASER electrode penetrating his left globe and orbit (Fig. 1). Visual acuity was 20/20 in the right eye and no light perception in the left eye. There was marked diffuse hemorrhagic chemosis of the left globe with significant proptosis and prolapse of charred, coagulated uveal tissue consistent with reports that electrical discharge of the TASER probe occurred. Fundus examination was unable to be performed in the left eye due to the extent of the injury. Orbital imaging (computed tomography) demonstrates a cylindrical metallic foreign body that penetrated the globe and lodged in the left medial wall of the orbit (Fig. 2).

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Anna B. Sharabura contributed to the writing and reviewing of the manuscript. Joseph W. Fong contributed to the conceptualization, writing, and reviewing of the manuscript. Anna B. Sharabura and Joseph W. Fong agree to shared co-first authorship of this manuscript. John D. Pemberton contributed to the conceptualization and reviewing of the manuscript. All the authors agree to be accountable for all aspects of the work.

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We believe, after reviewing the literature discussed in this case report, that sympathetic ophthalmia is not an overwhelming indication to choose enucleation over evisceration in managing patients with catastrophic unsalvageable ocular injuries and that evisceration has an advantage over enucleation with regard to functional/cosmetic outcomes.

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Written informed consent was obtained from the patient for publication of the details of his medical case and accompanying images. This case report adhered to the tenets of the Declaration of Helsinki and was compliant with the Health Insurance Portability and Accountability Act of 1996. This manuscript does not meet the definition of Human Subject Research at our institution, and the need for approval was waived by the Institutional Review Board.

In cases in which primary repair is not possible due to severe disruption of the globe − even with multifaceted injury patterns caused by TASER probes − the surgeon should avoid overlooking the option of primary evisceration for the patient. The advantages of evisceration include less disruption of the orbital anatomy, potentially better motility which results in superior functional and cosmetic outcomes, and lower rates of implant migration, extrusion, and conjunctival erosion than enucleation [4]. Despite Green's [14] 1972 report of 4 alleged cases of sympathetic ophthalmia following evisceration, our critical review of the literature shows that SO rarely occurs if ever following evisceration [15]. In our patient, despite the TASER barb penetrating through both the anterior and posterior globe with impalement into the medial orbital wall in addition to thermal and electrical injury to the intraocular structures, care was taken to preserve the integrity of the scleral shell during removal of the barb, allowing for successful primary evisceration.

All data generated or analyzed during this study are included in this article. Further inquiries can be directed to the corresponding author.

After receiving intravenous levofloxacin for endophthalmitis prophylaxis, the patient was taken to the operating room for exploration and extraction of the TASER probe (Fig. 3) with intentions of performing primary globe repair. However, a considerable amount of the intraocular contents including the uveal tissue, vitreous, and retina were found to be charred and tightly adherent to the probe or had already prolapsed through the corneal laceration. As a result, much of the intraocular contents was inevitably eviscerated upon extraction of the probe from the globe and orbit. Significant bleeding was encountered upon extraction of the probe, and bipolar cautery of the central retinal vasculature was necessary to achieve hemostasis. Given the degree of uveal tissue that was euthanized as well as the relative preservation of the scleral shell, the decision was made to perform a primary evisceration and placement of a porous polyethylene 22-mm sphere implant. Absolute alcohol was instilled to denature and remove all remaining uveal material and microorganisms from the scleral shell, thus mitigating the theoretical risk of sympathetic ophthalmia from remnant uveal pigment and minimizing infection risk. At a 6-month follow-up visit, the patient reported no issues with the uninjured eye and no socket pain on the left. Exam of the socket revealed healthy conjunctiva with no implant extrusion and good motility, and the patient reported that he is satisfied with the cosmesis, comfort, and movement of his prosthesis.

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Although deemed a less-than-lethal weapon, TASER electroshock weapons are capable of causing devastating injuries to facial and intraocular structures. The mechanical force of metal darts entering the orbit at 160 ft/s combined with an average pulse voltage of 600–700 V often results in globe disfigurement and destruction of tissue that portends a dismal visual outcome, and precludes globe sparing measures in many cases [1, 2]. The 9–13-mm-long darts are barbed and can damage the delicate superficial structures of the head and neck during both deployment and subsequent removal along the entry tract. Ocular tissues including the optic nerve and retina have a low resistance to electrical current; thus, they are prone to ischemia from coagulation and necrosis of their vascular supply [5]. It has been estimated that TASER darts strike and penetrate the face in 1% of cases, with even fewer cases of damage to the eye and orbit [6]. Several reports from 2005 onward describe mechanical and electrical injuries resulting in retinal detachment after anterior orbit perforation, cataract formation after electrical discharge across the eye, and globe perforation with uveal prolapse. The degree of injury attributed to electrical discharge in several reported cases, particularly in those with nonpenetrating injuries, has been disputed by some authors [1, 6, 7, 8, 9]. A systematic review by Kroll et al. [9] demonstrated that among 28 cases of ocular TASER probe injuries, 12 cases resulted in enucleation and 6 other cases resulted in complete blindness.

A 34-year-old male presented to the emergency department with a penetrating injury of the left globe and orbit from a Thomas A Swift's Electric Rifle (TASER^®) probe. The severity of the globe injury precluded primary closure of the globe; a primary evisceration was performed. In this article, we discuss not only the case in detail but also the TASER^® rifle and the literature to support our decision in performing an evisceration rather than an enucleation, which historically has been taught to decrease the risk of sympathetic ophthalmia (SO) in the fellow eye. We are of the opinion, after reviewing the literature, that SO is not an overwhelming reason to choose enucleation over evisceration and that evisceration has an advantage over enucleation with regard to functional and cosmetic outcomes.

When faced with a severely disfigured eye with no light perception after a penetrating TASER probe injury, the surgeon is often faced with the dilemma of offering the patient enucleation versus evisceration. Historically, the risk of SO affecting vision in the unaffected eye led surgeons to perform enucleation after catastrophic penetrating injury within 14 days of the injury. The incidences of SO following intraocular surgery and open globe trauma have been reported at 0.02% and 0.1–0.3% [10]. Using Bellan hypothetical calculations, Savar et al. [11] found that to prevent 1 incidence of blindness from SO, between 908 and 9,999 prophylactic enucleations are needed to be performed. These statistics reaffirm the thought that the injured eye should be salvaged and repaired with monitoring for SO with routine ophthalmic care. As a result, the practice of prophylactic enucleation to prevent SO in a traumatized eye has progressively fallen out of favor, as suggested by multiple case series discussing enucleation in traumatized eyes from other mechanisms [12, 13].

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All data generated or analyzed during this study are included in this article. Further inquiries can be directed to the corresponding author.

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Clinical photograph showing the impaled probe with TASER wire. a Significant proptosis and prolapse of charred, coagulated uveal tissue resulted from electrical discharge of the TASER weapon. b CT scan of the orbit demonstrating the cylindrical metallic foreign body perforating the left globe and impaled into the left medial wall of the orbit. TASER, Thomas A Swift's Electric Rifle; CT, computed tomography.

This article is licensed under the Creative Commons Attribution-NonCommercial-4.0 International License (CC BY-NC) (http://www.karger.com/Services/OpenAccessLicense). Usage and distribution for commercial purposes requires written permission.

Thomas A Swift's Electric Rifle (TASER®) is described as a less-than-lethal weapon designed to incapacitate the target by delivering pulses of electrical shock that cause tonic-clonic contractions of the skeletal muscle. This electrical shock is delivered by 9–13-mm-long barbed metal darts, depending on the weapon model, which are fired at 160 ft/s with pressurized gas and penetrate into skin or clothing to transmit multiple sequential pulses over a 5-second span with an average pulse voltage of 600 V [1, 2]. Ophthalmic and orbital injuries from the TASER are mechanical (from the dart impalement and penetration of the heavier and larger portion of the probe) and electrical (thermal damage from the high energy current). TASER injuries to the globe and orbit often result in severe globe disfigurement and destruction of tissue that precludes globe-sparing surgery. Rafailov et al. [3] reported the first case of an impaled TASER probe globe/orbit penetration injury that required primary enucleation due to significant intraocular tissue necrosis and iatrogenic injury after extraction of the probe. The specific details of the globe injury and reasoning for primary enucleation were not discussed in their report.

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It is known, among ophthalmologists, that evisceration has better functional and cosmetic outcomes than enucleation, and the incidence of sympathetic ophthalmia (SO) in traumatic open globes is exceedingly rare [4]. In light of this, we present a case similar to the case published by Rafailov et al. [3] in which we chose evisceration rather than enucleation. This case report adhered to the tenets of the Declaration of Helsinki and was compliant with the Health Insurance Portability and Accountability Act of 1996.