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Experienced and professional animal trainer provide their insights in answering this question :
A. In some rare cases Dog Lymphoma can have an ocular involvement due to an immune mediated reaction, which would cause Uveitis. i mentioned Lymphoma because of the swollen lymph nodes that where noticed at the same time ( the most common sign of lymphoma is swollen lymph nodes). What treatment is your dog on at the moment? was Lymphoma diagnosed?

How to Identify Common Pet Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced pet care professionals :

Autoimmune disease: In some cases, the body`s immune system may mistakenly attack healthy tissue, resulting in swollen lymph nodes. Allergies: Dogs with severe allergies may have swollen lymph nodes as a result of the allergic reaction.
Uveitis is a serious eye condition in pets and if left untreated can lead to blindness. The condition requires a detailed examination and investigation, aggressive management, and regular follow up monitoring and/or lifelong topical medications.
Lymphoma is a blood cancer that starts in the lymph nodes, but it can infiltrate any organ in the body, including the eyes. All photos provided.
Lymphoma: End-stage disease can cause dogs to act very lethargic, vomit, have diarrhea, eat less or have no appetite, and lose weight. If the lymph nodes are very large, they can affect breathing because they are blocking the throat. You may notice that your dog has trouble breathing or noisy inhalation (stertor).
Autoimmune disease attacks organs like the spleen, kidney, liver, skin, nails, eyes, and the body. This attack happens very suddenly and causes a dog to experience extreme lethargy, anemia, and even death.
Pannus in dogs, also known as Chronic Superficial Keratitis (CSK), is an autoimmune disease that affects the cornea (the clear) part of the eye and, if left untreated, can eventually scar the eye so badly it can cause serious vision impairment or blindness.
If only the ciliary body and the iris are inflamed it is called anterior uveitis, while inflammation of the choroid is called posterior uveitis. Uveitis may only involve one eye, or it may occur in both eyes at the same time.
Untreated uveitis can lead to blindness. It`s important to see your healthcare provider right away if you have eye redness, inflammation, or pain. In many instances, treatments help restore lost vision. They can also prevent more tissue damage and ease inflammation and pain.
Here are some common causes of blindness in dogs: Infections or Inflammation (viral, bacterial, fungal) Cataracts (can be caused by diabetes mellitus, toxins, genetics, or other diseases) Glaucoma.
As the disease progresses, internal organs such as the liver, spleen, and bone marrow become affected. Flu-like symptoms progress and ultimately result in the death of the patient.
Final Stage Dog Lymphoma Symptoms

Breathing difficulties (which is frequently indicated by laboured panting) Glassy eyes. Restlessness and discomfort. Unwillingness or inability to move or even stand.

Dogs with multicentric lymphoma may also develop lethargy, fever, anorexia, weakness, and dehydration as the disease progresses. Dogs with alimentary lymphoma, which affects the intestines, may present with vomiting, abdominal pain, anorexia, diarrhea, and weight loss.
Ultraviolet (UV) exposure is thought to be a predisposing or “triggering” cause of autoimmune skin diseases in some dogs. Certain drugs have also been reported as potential triggers for pemphigus foliaceus, a common form of autoimmune skin disease in dogs and cats. Early recognition is extremely important.
Infection. Certain infections which can affect the entire body (systemic infections), such as toxoplasmosis or blastomycosis, can cause sudden blindness.
Trachoma is the leading infectious cause of blindness worldwide. It is caused by an obligate intracellular bacterium called Chlamydia trachomatis.
The main ocular manifestations related to lymphoma have been reported to be anterior uveitis (in 18% of cases), retinal hemorrhage (9%), panuveitis (5%), posterior uveitis (3%), and ocular adnexal involvement (2%) [4].
In some cases, mostly in intermediate uveitis, posterior uveitis and panuveitis, where inflammation is recurrent and chronic, damage to the eye can occur, particularly to the retina and optic nerve, and cause permanent vision loss.
HLA-B27 positive anterior uveitis may be considered a different clinical disorder and is associated with systemic diseases such as AS, Reiter`s syndrome, inflammatory bowel disease (IBD), and psoriatic arthritis (PA).
Ocular manifestations of Lyme disease in dogs

Some common ocular manifestations of Lyme disease include: Uveitis: This is an inflammation of the uvea, which is the middle layer of the eye that contains blood vessels and connective tissue. Symptoms include redness, pain, light sensitivity and blurred vision.

Uveitis damages the part of the eye called the uvea — but it often affects other parts of the eye, too. Sometimes uveitis goes away quickly, but it can come back. And sometimes it`s a chronic (long-term) condition. It can affect 1 eye or both eyes.
Uveitis symptoms

floaters — spots in the eye that look like tiny rods or chains of transparent bubbles floating around in the field of vision. eye pain and redness. general vision problems, including blurred or cloudy vision.

Forebrain tumors in dogs can also cause acute blindness in one or both eyes.
MYTH: Blind and blind-deaf dogs can`t enjoy life so it`s humane to put them down. Reality: If they can smell, taste, hear your voice talking and feel you petting them, they`re enjoying life. They enjoy the same things sighted dogs do: walks, belly rubs, meal time, play time and more!
Most pets with kidney disease have high blood pressure which can further the decline of the animal and result in blindness. Watch your pet`s blood pressure by trying to help them be calm and not upset by everyday things.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. My minature schnauzer became blind in both eyes overnight, swollen lymp nodes in her neck and one rear leg. Uveitis diagnosis, not responding to meds.
ANSWER : A. In some rare cases Dog Lymphoma can have an ocular involvement due to an immune mediated reaction, which would cause Uveitis. i mentioned Lymphoma because of the swollen lymph nodes that where noticed at the same time ( the most common sign of lymphoma is swollen lymph nodes). What treatment is your dog on at the moment? was Lymphoma diagnosed?

Q. Weak, discharge from eyes, swelling on right eye, does not want to open eyes. What is wrong?
ANSWER : A. If the discharge from the eye is green or yellow in color, it can indicate a secondary infection. Swollen eyes can be caused by a number of things ranging from allergies to infections, to injury to the eye itself or surrounding areas.

It is best to have your pet’s eye examined by your local vet. They will most likely wish to place a stain in the eye that can check for damage such as cuts or scratches. An ointment can then be given to help reduce inflammation, pain and take care of infection.

Until you can get to the vet, be sure to not let your pet scratch or paw at their eye as this can make things worse. You can also use a warm wet washcloth to gently remove any debris and allow the eye to open some, providing relief. However, if symptoms worsen, or the swelling travels to the face, head or neck, it may indicate a serious allergic reaction which should be treated immediately.

Q. I was told by my vet that my dogs cherry eye was caused by something hitting his eye when he was poking around under a bush. I was told surgery needed
ANSWER : A. Prolapsed gland of the eyelid refers to a pink mass protruding from the animal’s eyelid; it is also called a “cherry eye.” Normally, the gland is anchored by an attachment made up of fibrous material. The most common sign of “cherry eye” is an oval mass protruding from the dogs’s third eyelid. It can occur in one or both eyes, and may be accompanied by swelling and irritation. He may have acquired it by getting an injury to his eye but this isn’t the case sometimes. Sometimes there is a weakness in the fibrous attachment.

The veterinarian will review the mass in the dog’s third eyelid and determine if there is an underlying cause for the condition. The diagnosis of the prolapsed gland could be scrolled or everted cartilage in the third eyelid, abnormal cells in the third eye, or a prolapse of fat in the dog’s eye.

Treatment often includes surgical replacement of the gland in the dog’s eye, or removal of the entire gland if the condition is severe. Conversely, if medications are recommended, they are typically topical anti-inflammatory drugs that are effective in reducing swelling.

Q. One eye is more red than the other. Last night he was pawing at it,today, he isn’t. Should I bring him to the vet?
ANSWER : A. Sounds possible that he had some irritation to the eye that is at least not itchy anymore. You can do either, having it checked now to confirm mild irritation, potentially due to debris or a topical irritant to the eye; or you can flush the eye with sterile saline eye wash (over the counter) using care not to poke or prod the eye and see if the irritation goes away on its own within the next 24 hrs. It has shown improvement already it appears, however if it is not cleared up and your pet seems irritated by it AT ALL, then it should be looked at by a vet and tested for a possible corneal scratch or ulcer. These can cause redness of the eye, eye discharge and pawing at the face. They are usually treated by prescription only topical eye antibiotic ointment and generally do very well after treatment.

Read Full Q/A … : Eye Problems in Cats

Q. My pet is suffering eyes discharge, what should I do?
ANSWER : A. Mucus, yellow-green pus, or a watery eye discharge can all be signs of conjunctivitis, which is inflammation of the lining of your dog’s eye.

There is a wide range of causes for conjunctivitis, from allergies, injury, birth defects, and tear duct problems, to foreign bodies, dry eye syndrome, infections or even tumors.

Other signs of conjunctivitis include excessive blinking or keeping the eye closed, squinting and pawing at the eyes.

Treatment of this condition depends on the underlying cause. In most of the cases cleaning, soothing the eye and applying antibiotics eye drops suffice but is some instances further investigation is required to establish the cause of the excessive eye discharge, and this should be performed by a veterinarian.

Q. What can be given to dogs to stop the brown draining around dogs eyes? I was told tetracycline would work.
Thanks
ANSWER : A. Eye leakage is normal in some breeds of dogs, especially those that are more “bug-eyed” types. This eye leakage is just normal tears coming from the eye which can stain lighter colored coats. Unless there is an infection it does not need to be treated with antibiotics. Signs of infection usually include drainage that is thick or goopy and is yellow or greenish in color. Dogs with infections may also want to keep the eye closed, or may paw and scratch at it.

For plain tear-staining. Tear-stain wipes can be used around the eyes to remove the stain and bring the coat back to natural color. If infection is suspected, it is best to have your vet take a look at the eye prior to placing any medications in it.

Q. Can eye redness be caused by leash pressure on the dog’s neck during a training class?
ANSWER : A. Absolutely. Pressure on the neck restricts major blood vessels that lead to the eyes (and other areas) which can lead to pressure on the eyes causing red eyes.

As long as the eyes aren’t runny or have a milky/yellowish colored discharge, that would indicate infection and a trip to vet.

Try switching to a front attach harness to help with training. That will take all the pressure off the neck (and those arteries and thyroid gland too) while still helping you with training.

Q. Yes I have a Chiquita and her left eye was swollen and red then next it spread to the other eye. What should I do when all the vets are close?
ANSWER : A. If both eyes are swollen shut or you are seeing swelling of the face and neck in addition it may indicate a serious allergic reaction and you should seek care from an emergency vet immediately. It is also best to try and schedule an appointment with your regular vet when they reopen if the eyes are very red or bothered or if the redness spreads. You can use a warm washcloth to remove any debris from the eyes to make them more comfortable, however seeking veterinary care is best.