กลุ่มอาการฮอว์ส

Key Facts

• Protrusion of both third eyelids (nictitating membranes)
• Not reported in dogs
• Vision normal but may be functionally decreased by eyelid obstruction
• Often associated with gastrointestinal inflammatory disorders
• Phenylephrine eye drops confirm diagnosis (eyelids return to normal in 20 min)
• Usually self-limiting — average 47 days to resolve
• Treat any associated diarrhea