Tag Archives: Welsh Springer Spaniel

The Lens and Vitreous

The lens develops rapidly in the early stages of embryogenesis, during which time it is nourished by the hyaloid vessel. The fully developed lens is avascular; by the second week of life, no remnants of the hyaloid system should remain. The normal lens often exhibits minor imperfections that can be easily detected with magnification in dogs and cats younger than 1 year. These include prominent anterior and posterior Y sutures and minute granules in its nucleus and cortex. A mosaic of brown pigment spots is occasionally seen on the anterior lens capsule near the center of the pupil, representing remnants of embryonic mesoderm. Disease of the vitreous would be expected to influence the lens or retina because of its attachments at the posterior lens surface and the optic disc. Congenital Abnormalities Congenital lens abnormalities include alterations in size or shape. Congenital absence of the lens (aphakia) is uncommon. In microphakia, the margin of the abnormally small lens along with elongated ciliary processes may be observed after pupillary dilation. Microphakia occurs along with other ocular defects in the Saint Bernard and beagle and in cats. Luxation of the microphakic lens may cause glaucoma. Lenticonus is a Read more […]

The faults and defects of the breeds: Sporting Dogs

Brittany Patella luxation: Hip dysplasia Chesapeake Bay Retrievers Hip dysplasia; Elbow dysplasia Clumber Spaniels Hip dysplasia Cocker Spaniels (American) Hip dysplasia; IVD (intervertebrate disk disease); Patella luxation, either medial or lateral; Elbow dysplasia; Thyroid disorders; Neoplasias; Anury (no tail, no caudal vertebrae); Brachury (short tail) Curly-Coated Retrievers Thyroid disorders; Calcium metabolic disorders; Juvenile osteoporosis. English Cocker Spaniels Swimmers syndrome (i.e. the inability to stand at four to six weeks of age) English Setters Hip dysplasia; Neoplasias English Springer Spaniels Hip dysplasia; Myasthenia gravis Field Spaniels Thyroid disorders; Hip dysplasia Flat-Coated Retrievers Hip dysplasia; Patella luxation; Neoplasias German Shorthaired Pointers Pannus; Neoplasias German Wirehaired Pointers Hip dysplasia; Toe fractures Golden Retrievers Hip dysplasia (very high incidence); Elbow dysplasia; OCD (osteochondrities dissecans) of elbow; Muscular dystrophy; Thyroid disorders; Neoplasias Gordon Setters Hip dysplasia; Thyroid disorders Irish Setters Generalized myopathy (i.e. stiff gait and other difficulties); Carpal (pastern luxation; Read more […]