Clinical Course and Optical Coherence Tomography of Ocular Angiostrongyliasis: A Case Report

To report the clinical course and optical coherence tomography (OCT) findings of ocular angiostrongyliasis.

A 36‑year‑old female with a history of ingesting regular raw freshwater shrimp and other raw food presented with acute unilateral painless visual loss in the right eye. Her right eye’s best‑corrected visual acuity (BCVA) was 1 ft of the count finger. Fundus examination showed vitritis, generalized retinal pigment epithelial alteration, and a moving roundworm in the vitreous at the 6 o’clock position. Macular OCT of her right eye showed thinning of the retina, loss of the external limiting membrane and ellipsoid zone, subretinal hyper‑reflective material clumping, and hyper‑reflective foci at the superficial choroidal layer.

The patient was administered oral and topical prednisolone. The roundworm, identified as Angiostrongylus cantonensis, was wholly extracted from the vitreous using a 23G sclerotomy port and pars plana vitrectomy. The final BCVA was 1 ft of the count finger.

This case report describes an infrequent presentation and illustrates the clinical course and OCT findings of ocular angiostrongyliasis.