Many different reasons cause blindness in dogs. Some dogs are already blind when they were born. This is either because of a hereditary disease or a congenital disorder, which means the dog was already born with it. But there are some scenarios wherein dogs become blind because of an injury or illness. There are also dog breeds that are predisposed to illnesses that affect their vision.
Vision problems can happen to any dog. Due to aging, some dogs gradually lose their sight. In senior dogs, blindness is a fairly common health problem. Many different medical conditions are also known to be a cause of blindness in dogs.
As cloudiness develops in the lens of an eye, Cataracts cause gradual vision loss. There are dog breeds that are susceptible to cataracts. Sometimes, diabetes is the precursor. Veterinary ophthalmologist can sometimes surgically remove cataracts.
An excruciating increase of the pressure inside one or both of the eyes is caused by Glaucoma. The pressure and pain can be relieved by treatments. Glaucoma may progress, resulting to a point where the eye must be removed because medication is not effective anymore. The eye may rapture if glaucoma progresses. Well known cause of glaucoma in dogs is diabetes especially if the diabetes is not regulated well.
Another cause of blindness in dogs is SARDS or Sudden Acquired Retinal Degeneration Syndrome. Even though it is not painful it causes acute blindness. No treatment or cure is currently available for SARDS.
A hereditary disease that causes gradual loss of vision is Progressive Retinal Atrophy or PRA. It causes degeneration of the retina. This is not painful nor fatal. Sadly, there is no treatment or cure that is available for this at the moment.
Elevated blood pressure, tumor, trauma, and inflammation. These are the typical causes of retinal detachment. Some situations may be cured by surgery while others cannot be treated.
If not treated, corneal ulcers can cause loss of vision or blindness in the affected eye.
A congenital disease called Anophthalmia is a condition where dogs are born without eyes.
Microphthalmia is another type of congenital disease where a dog is born with small, underdeveloped eyes, resulting to poor vision or no vision at all.
There are certain brain diseases that damage the optic nerve, impairing vision. This include brain tumor, a seizure disorder, or some other brain diseases.
A puncture, abrasion, or swelling of the eye that is cause by trauma can result to blindness too, especially if it is left untreated.
A degenerative condition of the macula which is a part of the retina is called Macular degeneration. This is a common in aging dogs which leads to gradual vision loss.
There are other diseases which can cause dogs to be blind. Redness, cloudiness, swelling, squinting, spasms, pawing or rubbing of the eyes, tearing or discharge in an excessive manner, and many other symptoms are signs of eye condition. Make sure to get to the vet as soon as you suspect that your dog is having any eye problem. Many eye diseases can progress rapidly and cause irreversible damage if left untreated.