视神经萎缩伴视盘周围视网膜变性，马
In this horse with equine recurrent uveitis, no retinal vessels are visible, which is indicative of optic nerve atrophy. In addition, a butterfly-shaped, hypopigmented lesion consistent with retinal degeneration surrounds the optic nerve.
Courtesy of UC Davis Veterinary Ophthalmology Service.
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