Enophthalmus
Enophthalmus means displacement of the eyeball backwards into the orbit. General Causes are pain or irritation of the eye or eyelid due to foreign body or corneal ulceration, Dehydration, Loss of orbital fat or muscle or conditions like Microphthalmia, Phthi bulbi, Collapsed globe or Horner's syndrome. Although this is conformational in long-nosed (dolichocephalic) breeds