Experienced and professional animal trainer provide their insights in answering this question :
A. It can be connected with opthalmological disease – viral, bacterial or fungal infection, parasite, conjunctivitis, injury of the eye. see a vet toi check what is going on.

How to Identify Common Pet Problems ?

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

If the eyes start closing, and it`s not because you`re scratching a birdie head and inducing pure birdie joy, the bird might be sick. Oh, and be careful: birds often close one eye but not the other. You may not notice a bird is keeping its farther eye closed sometimes. Sleeping excessively.
Eye Problems in Birds

There are several possibilities as to why her eye is painful and she is holding it closed. The most likely, based on her history, is a retinal injury or scratch on the surface of the eye from the other bird she was introduced to.

A squinty or slitted eye will tell you that a bird is having serious misgivings about its environment. When a bird is angry, the eye might remain round but there is focused intensity to their glare. Sometimes there is what appears to be a “furrowed brow” above the eye of an angry bird.
If your cockatiel is shaking with its eyes closed, most of the time, it`s a sign of sickness. Your cockatiel might not be feeling well or feeling fatigued and tired. The reason why birds do this is that in the wild, any sign of weakness in birds could be an invitation to predators.
Birds have developed a fascinating adaptation called “peeking”, that allows them to sleep in risky environments. This involves opening one eye intermittently and keeping half of the brain active to monitor their surroundings. Peeking allows the animal to conserve energy while staying vigilant to potential threats.
If you notice any swelling, redness, discharge from the eye, excessive blinking, or holding the eye(s) closed, you should consult your veterinarian immediately for treatment. Most eye infections can be treated successfully with antibiotic eye drops or salves.
Look at the bird`s feathers for an indication if they suffering stress lines. Aggression – If your bird suddenly has a change in their demeanour and becomes aggressive, this could be a sign of stress. Biting, hissing, lunging, and excessive screaming are all signs to watch out for.
Your bird may move his wings to stretch or get exercise, but he also may be telling you something. Wing flapping generally means a bird is either seeking attention or displaying happiness. If your bird is flipping his wings, it often means he is upset by something.
But birds have a third eyelid, a thin membrane that closes sideways. A semitransparent film, the nictitating membrane, slides across their eyes when they blink. It momentarily obstructs their vision. Their blinks serve the same purpose as ours: keeping their eyes clean and moistened.
Birds are therefore able to see better to the side than straight ahead. This often forces birds to observe objects one eye at a time, and the resulting image is flat and lacks accurate depth perception. But birds have several visual adaptations that help compensate for the limitations of monocular vision.
Anyway, a hawk with one eye (or one functioning eye) has a good chance of surviving in the wild, in fact, a great chance.
According to Gill (2006), “Birds typically close their eyes when they sleep, but just one eye at a time for unihemispheric sleep.
Birds that are infected with highly pathogenic avian influenza are more Page 2 2 severely ill and could exhibit one or more of the following clinical signs: sudden death; lack of energy and appetite; decreased egg production; soft–shelled or misshapen eggs; swelling; purple discoloration; nasal discharge; coughing, …
The infection will usually clear up in 7 to 14 days without treatment and without any long-term consequences. However, in some cases, viral conjunctivitis can take 2 to 3 weeks or more to clear up. A doctor can prescribe antiviral medication to treat more serious forms of conjunctivitis.
Parrots and some other species of birds are known to be extremely empathetic and tuned into the emotional environment around them. They can sense stress and tension, anger and distress in their owners, before these bubbling feelings break the surface.
It would be best to only give your parrot eye drops that have been prescribed by your vet. Can I do this to any bird? Birds with sensitive, damaged, or infected eyes shouldn`t be given any eye drops unless a vet tells you to do so.
Flush the eye out well with sterile, preservative-free saline solution or eye wash. You can use a syringe filled with tepid, sterile water if you don`t have eye wash available. Once you`ve flushed the eye out, wipe the area with a clean cotton ball. Be extremely careful not to scratch your birds` eye.
The typical signs of a sick bird are often referred to as the `sick bird look` or SBL. This is typically a bird that is quiet, eyes closed and feathers fluffed up. When a bird is in this condition, it means they have lost the ability to pretend they are well, and are now very ill.
Parrots are very sensitive to our emotions, sometimes better than we are. Our birds are keen observers of our facial expressions, body language, tone and even energy levels and therefore we have to be cognizant of how our emotions can impact our birds.
Your bird may experience pain the same way you do. Birds may experience pain from an injury, illness or chronic health condition. A bird`s pain may range from mild discomfort to debilitating levels of pain.
So birds certainly possess the capacity to mourn—they have the same brain areas, hormones, and neurotransmitters as we do, “so they too can feel what we feel,” Marzluff says—but that doesn`t mean we know when it`s happening.
Many parrots are afraid of the dark. Cockatiels are especially prone to night frights. Night frights are when your bird flaps and flails inside and around its cage. When this happens, immediately turn on a soft light and speak to your bird softly until he calms down and goes back to his perch.
Extremely frightened Parrots may attack the object of their fear, or vocalise. Many caregivers may observe the Parrot`s feathers being held close to their bodies, pinned eyes or if crested (such as Cockatiels), these being erected.
The Avian Welfare Coalition informs us that parrots can become jealous especially with visitors and other pets. An overly jealous parrot isn`t fun to be around. It will be important to learn how to socialize and train your parrot to accept other people and pets.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

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. MY parrot is closing one of her eyes. She opens it if I force, else close that automatic. What should I do?
is it any symptom of a serious problem???
ANSWER : A. It can be connected with opthalmological disease – viral, bacterial or fungal infection, parasite, conjunctivitis, injury of the eye. see a vet toi check what is going on.

Q. My dog cant close her eye.not displacement?
ANSWER : A. Take her to your vet as an emergency. If she cannot close the eye it means that she cannot lubricate the cornea with tear film. The eye will become dry and it will cause a lot of problems starting with corneal ulcer. If she is not able to close the eye there may be a problem with the eye itself (swelling, abscess etc) but it cold be due to problem with the nerves to are responsible for movement of eye lids .

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. 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. 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. My Pomeranian has a very sore I could be pinkeye or what else
ANSWER : A. Your question got a little jumbled. Yes, dogs can get something like “pink eye”, meaning infectious conjunctivitis. It typically causes eye discharge that’s yellow or green, and a red eye and sometimes swelling. The problem is that many eye diseases present in a very similar fashion, and it could be something more serious that conjunctivitis, like a corneal ulcer or glaucoma. I always recommend that all eye problems be checked out by a veterinarian, as it can be very dangerous to delay treatment in some of the more serious eye diseases.

Q. What can be given to dogs to stop the brown draining around dogs eyes? I was told tetracycline would work.
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.