What causes a senior dog's foggy eye to become red and swollen?

This looks seriously painful and you need to take Red Jack to your veterinarian for an exam tomorrow morning. This looks like ruptured ulcer that needs to be treated by a veterinarian. Your dog will also need pain medicine.

Olini needs to see a vet as soon as possible. Potential causes for the sudden change that you see in the eye include severe conjunctivitis, corneal ulcer or abrasion, glaucoma, uveitis, and trauma. I can't quite tell from the picture, but it may be proptosed ("popped out"). If you have an emergency vet clinic open near by, this would be a case that I would advise seeking emergency care.

Oh no, that's not good at all! Her eyes are extremely swollen and unfortunately without seeing her in person, I can't say what is causing it. Any eye problem is an emergency because leaving it untreated can lead to vision loss. I would take her into a vet immediately to get this diagnosed and treated. Please take her into an ER vet clinic; if there isn't one in your area, there will be a vet on call for emergencies. The information to reach that vet is found on a clinic's answering machine or website. I hope this helps!

This is an emergency, your vet should see you right away, if he refuses you have to take him to another vet that will see him today. cloudiness of the eye is a very serious symptom, there are several eye condition that could cause that but it is important to start the treatment urgently, otherwise permanent eye damage could occur.

Thank you for providing pictures of Lorraine's eye, she is adorable! What is showing in her eye is her third eyelid, and given that it has worsened over the day, yes, I do recommend an emergency appointment. The eye is such a delicate and important structure that any problem with it should be considered an emergency. This is because leaving it untreated can lead to vision loss. It could be that she has an eye infection or could have injured her eye causing the third eyelid to come out, but a vet can make the correct diagnosis and give her a treatment for it. Please take her to the vet tomorrow. Best of luck!

This looks like a swelling of Poppy's conjunctiva as opposed to the eye itself. It could be due to an allergic reaction or infection such as conjunctivitis. She will need eye drops and antinflammatories to settle this down so go to your vet as soon as you can. In the mean time pressing a cooled tea bag on the outside of the eye can provide some relief.

Hi, thabks for using Petco Pet Education Center, formerly Petcoach! Poor Princess! The pictures are blurry but I am very concerned about her left eye. I'm worried about proptosis (eye has popped out of the socket) or glaucoma. Both are emergencies. I recommend that you take Princess to the emergency room. Good luck!