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Background <p>Foreign bodies are a common cause of eye pain and tears; however, the majority of cases involve small foreign bodies. Herein, we report a rare case of a large plant-derived foreign body covered with thorns penetrating the conjunctiva into the subconjunctival plica semilunaris following vigorous eye rubbing.</p> Case presentation <p>A 50-year-old woman from rural Leshan presented with persistent redness and swelling on the nasal side of her left eye lasting 10 days. The plica semilunaris appeared elevated, congested, and edematous. A sharp plant-derived tip, approximately 1-mm in length, was visible on the nasal aspect of the elevated area. The temporal bulbar conjunctiva appeared pale and semicircular. The foreign body was extracted from the conjunctiva under a slit lamp by grasping the exposed tip. The extracted foreign body, measuring 8&#xa0;mm in length and 4&#xa0;mm in diameter, resembled a plant-derived seed with thorns covering its surface. The patient’s conjunctival inflammation and discomfort resolved completely following removal and topical treatment.</p> Conclusion <p>When evaluating patients presenting with ocular irritation as the chief complaint, thorough ocular examinations should be performed, particularly considering the possibility of occult foreign bodies. Concurrently, the present case underlines the significance of considering occult subconjunctival foreign bodies in cases of persistent conjunctival inflammation.</p>

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Management of a large plant-derived foreign body under the plica semilunaris: a case report

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月3日

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  • Jiao Zhao,
  • Qingqing Zhang,
  • Zhike Xu

摘要

Background

Foreign bodies are a common cause of eye pain and tears; however, the majority of cases involve small foreign bodies. Herein, we report a rare case of a large plant-derived foreign body covered with thorns penetrating the conjunctiva into the subconjunctival plica semilunaris following vigorous eye rubbing.

Case presentation

A 50-year-old woman from rural Leshan presented with persistent redness and swelling on the nasal side of her left eye lasting 10 days. The plica semilunaris appeared elevated, congested, and edematous. A sharp plant-derived tip, approximately 1-mm in length, was visible on the nasal aspect of the elevated area. The temporal bulbar conjunctiva appeared pale and semicircular. The foreign body was extracted from the conjunctiva under a slit lamp by grasping the exposed tip. The extracted foreign body, measuring 8 mm in length and 4 mm in diameter, resembled a plant-derived seed with thorns covering its surface. The patient’s conjunctival inflammation and discomfort resolved completely following removal and topical treatment.

Conclusion

When evaluating patients presenting with ocular irritation as the chief complaint, thorough ocular examinations should be performed, particularly considering the possibility of occult foreign bodies. Concurrently, the present case underlines the significance of considering occult subconjunctival foreign bodies in cases of persistent conjunctival inflammation.