This 8-year-old male Great Dane was presented for evaluation of worsening episodes of respiratory discomfort and panting. When the dog was hospitalized, increased redness was noted in both eyes.
In what location is the most important lesion shown in the left eye?
a) Eyelids (diamond eye)
b) Third eyelid (chemosis and hyperemia)
c) Anterior segment (large pigmented spot on dorsomedial iris)
d) Posterior segment (mass in the vitreous)