Closantel Retinal Toxicity: Case Report and Literature Review

Figure 1

(a) The fundus photograph of both eyes shows a small area of myelinated axons on the inferior margin of the right optic nerve head and very mild peripapillary whitening and nerve fiber layer swelling more prominent in the right eye. (b) Fundus autofluorescence images show a hypoautofluorescent area corresponding to the small area of myelinated axons on the inferior margin of the right optic nerve head and the normal appearance of the left eye. (c) Macular optical coherence tomography (OCT) revealed diffuse outer nuclear layer hyperreflectivity and indistinguishable external limiting membrane and ellipsoid. (d) Electroretinography displayed severely attenuated responses in both eyes.

(a)

(b)

(c)

(d)