A Surprising Cause of Vitreous Base Avulsion: Presence of an Intraocular Pen Tip

To present the outcomes in a patient who underwent acute vitreous base avulsion as a result of a penetrating ocular trauma with a pen and the intraocular retention of the pen tip. A 13-year-old female patient presented with a penetrating ocular injury with a pen. Upon ophthalmological examination, visual acuity was found to be 20/20 in the right eye, and counting fingers from 3 m in the left eye. Scleral penetration was observed 5 mm temporal from the limbus in the supe-rotemporal region of the left eye. Acute vitreous base detachment was apparent with the slit lamp examination, which became visible as a vertical line in the temporal quadrant. The detachment was imaged with anterior segment and ultra-widefield fundus photography. An intraocular foreign body consisting of the tip of the pen was detected.
Although vitreous base avulsion is a common outcome of blunt ocular trauma, it is reported less frequently due to dif-ficulties in its detection. To the best of our knowledge, this is the first case reporting vitreous base avulsion due to an intraocular pen tip, which was treated successfully.