ABSTRACT
Oral administration of dimethyl sulfoxide to young dogs reduces relucency of the lens cortex, causing the normal central zone of lens to act as a strong biconvex lens.
Subject(s)
Dimethyl Sulfoxide/administration & dosage , Dimethyl Sulfoxide/toxicity , Lens, Crystalline/drug effects , Refraction, Ocular , Animals , Dogs , OphthalmoscopyABSTRACT
An asymptomatic, ophthalmoscopically visible proliferation affected the optic disc and nerve of two aged horses. The lesion consisted of an accumulation of foamy cells, histologically akin to fat cells, which contained an unidentified lipid-like material. The affected area and its environs were permeated by tortuous, thickened blood vessels with heavy deposits of collagen in their walls. The neuropathy is considered to be a storage disease, and although the product stored is unidentified, the lesion is similar to that of human xanthelasma. The neuropathy seems distinct from the exudative optic neuritis of horses that has been known since 1890.
ABSTRACT
The patency of the hyaloid artery in neonatal Beagles was evaluated after liquid latex perfusion. As early as postpartum day 5, some pups had closure of the most distal branches of the vessels of the posterior lens tunica, but in these, many larger branches were open. Other pups at postpartum days 5 and 6 had substantially all of the blood vessels of the posterior tunica vasculosa lentis open. Few tunica vessels were patent in any pups beyond day 13, and none was patent after day 17. Persistent hyaloid remnants at the optic disk were evident in 3 of 16 pups 17 to 28 days old, but absent in the others.
Subject(s)
Dogs/anatomy & histology , Lens, Crystalline/blood supply , Aging , Animals , Animals, Newborn , Arteries/anatomy & histology , Dogs/genetics , Female , Latex , Male , Optic Disk/blood supplyABSTRACT
An 8 1/2-year-old Collie dog was referred for evaluation of chronic diarrhea as well as sudden blindness and leukokoria of the right eye. An organism morphologically similar to Prototheca sp was recovered from the subretinal fluid and was found at necropsy in the eyes, gastrointestinal tract, lungs, lymph nodes, kidneys, heart, abdominal fat, and omentum.
Subject(s)
Dog Diseases , Eukaryota , Eye Diseases/veterinary , Parasitic Diseases, Animal , Animals , Blindness/veterinary , Chorioretinitis/parasitology , Chorioretinitis/pathology , Chorioretinitis/veterinary , Diarrhea/veterinary , Dog Diseases/parasitology , Dog Diseases/pathology , Dogs , Female , Granuloma/parasitology , Granuloma/pathology , Granuloma/veterinary , Lymph Nodes/parasitology , Parasitic Diseases/parasitology , Parasitic Diseases/pathology , Reflex, Pupillary , Retina/parasitology , Retina/pathology , Retinal Detachment/veterinaryABSTRACT
An 8-year-old Labrador Retriever developed unilateral exophthalmos over a 1-year period. Contrast radiography, surgical exploration, and histologic examination revealed the cause to be an adenocarcinoma arising from the zygomatic salivary gland or duct.