Image Quiz: Ophthalmology-A young Labrador with a blind, enlarged right eye

During this 3-year-old Labrador retriever's wellness examination, you notice that the dog's right eye is blind and larger than the left eye; hyphema is also present. The owner reports that the dog started squinting about two months ago and soon stopped showing signs of ocular discomfort.

What are the linear opacities (photo, arrows)? And what do you tell the owner is likely affecting that eye?

a) Corneal ulcers; a possible infectious process

b) A flash artifact; the eye is probably fine

c) Corneal dystrophy; the eye may have several congenital anomalies

d) Corneal stretching; the eye has been glaucomatous for a long time