The diseases of the lens and retina described above represent the overwhelming majority
of inherited eye conditions in the dog for which causal mutations have been identified.
«The list
of inherited eye conditions in the breeds specified are those which will be designated as «Unaffected» or «Affected» on the bottom part of the certificate and the results will be sent to the Kennel Club for publication».
Not exact matches
Here's the rest
of it:»... Reason tells me, that if numerous gradations from a simple and imperfect
eye to one complex and perfect can be shown to exist, each grade being useful to its possessor, as is certainly the case; if further, the
eye ever varies and the variations be
inherited, as is likewise certainly the case; and if such variations should be useful to any animal under changing
conditions of life, then the difficulty
of believing that a perfect and complex
eye could be formed by natural selection, though insuperable by our imagination, should not be considered as subversive
of the theory.
Reason tells me, that if numerous gradations from a simple and imperfect
eye to one complex and perfect can be shown to exist, each grade being useful to its possessor, as is certain the case; if further, the
eye ever varies and the variations be
inherited, as is likewise certainly the case; and if such variations should be useful to any animal under changing
conditions of life, then the difficulty
of believing that a perfect and complex
eye could be formed by natural selection, should not be considered as subversive
of the theory.»
Unfortunately, Portuguese Water Dogs can
inherit or develop a number
of different
eye conditions, some
of which may cause blindness if not treated right away, and most
of which can be extremely painful!
Some dogs
inherit this
condition, though it can also be caused by old age, diabetes mellitus, inflammation
of the
eye, exposure to a toxic substance, or even abnormally low levels
of calcium in the blood.
The OFA (Orthopedic Foundation for Animals) maintains a registry
of animals that have been examined by a veterinary ophthalmologist and found to be free
of significant
inherited eye conditions.
Cherry
eye is a common
condition inherited in certain breeds
of dogs In rare cases cats can also be affected by...
Genetic testing may help clarify if a dog is affected with PRA - prcd or another
inherited condition of the
eye.
The
inherited conditions of aortic stenosis (a narrowing above the aortic heart valve or the aortic valve itself), atopy / allergic dermatitis (skin allergies), gastric dilatation volvulus (bloat / stomach dilation), early onset cataracts (a clouding
of the lens inside the
eye), dilated cardiomyopathy (enlargement
of the chambers
of the heart and thinning
of the muscle wall), elbow dysplasia (abnormal growth
of tissues that leads to malformation and degeneration
of the joint), epilepsy (brain seizures), hypothyroidism (underactive production
of thyroid hormones), intervertebral disk disease (problems with the disks between the vertebrae
of the spine leading to neurological problems), and hepatic portosystemic shunt (an abnormal blood circulation where blood is diverted around the liver rather than into it) are more prevalent in purebred dogs than in mixed - breed.