How much will this cost? 3 days his eyes are close and one…

It could be due to trauma, an infection, or allergies. Go to a vet if you can. If you can't go to the vet, call your local pet store whenever they open and ask if they have any antibiotic eye ointment such as Terramycin (You may be able to order it online if you press the link I attached). Alternatively, your local pet store may have other medicated eye drops.

https://www.1800petmeds.com/Terramycin+Ophthalmic+Ointment-prod10190.html

https://www.petsmart.com/dog/dental-care-and-wellness/treatments/microcynah-opthalmic-pet-gel-5266152.html

Apply it to the eye once every 12 hours for 2 weeks. You could also try flushing the eye with human eye wash once every few hours. For pain, you can try gently holding a warm compress over the eye for a few minutes. Do not apply much pressure. Put a cone on your pet from your local pet store to keep your pet from scratching the eye. That's about all you can do at home. Do you have any questions about what I said?

You can also try 1mg of Benadryl per pound of body weight once every 12 hours. Also, you can try giving your pet a Dog Aspirin for pain. You can get it from your local pet store. Don't give it longer than 3 days though. Call your local pet store to see if they have some. You can give your dog people aspirin but you need to give it with Pepcid to protect the stomach. Do not give aspirin if your dog has a history of liver or kidney problems or is taking steroids or other NSAIDs from your vet. Aspirin can cause stomach ulcers in a few cases. Usually, if it is given for only a day or two it is fine though. You could also try homeopathic products, something like hemp or cbd oil for dogs. They don’t work in every case though.

Ok try the things I said then.

Like I said, it could be severe alergies or an infection or an eye injury.