I have a miniature Schnauzer, who is 4 years old and in good health, but a couple days ago I noticed that his right eye is bluish and the left eye is normal (dark).
I took two pictures to compare them with each other:
I set up an appointment with a veterinarian, but in my city I was only able to get an appointment for Saturday, and I'm worried about his situation.
Is this something I worry about? Does it look like a cataracts disease, or maybe an eye injury?
What could cause his eye to be blue, and what can I do before his appointment with the veterinarian this weekend?