Diagnostic Ophthalmology

[摘要] A 4-year-old spayed female Cavalier King Charles spaniel dog was examined at the ophthalmology service at the Western College of Veterinary Medicine for evaluation of white spots in the corneas. The menace responses, palpebral, occulocephalic, and direct and consensual pupillary light reflexes were present bilaterally. Schirmer tear test (Schirmer Tear Test Strips; Alcon Canada, Mississauga, Ontario) values were 22 mm/min bilaterally. The intraocular pressures were estimated with a rebound tonometer (Tonvet; Tiolat, Helsinki, Finland) and were 17 and 18 mmHg in the right and left eye, respectively. Fluorescein staining (Fluorets; Bausch & Lomb Canada, Markham, Ontario) was negative bilaterally. On direct examination there were 3 mm diameter, dense, oval, refractile, white opacities in the axial corneas of both eyes. Biomicroscopic examination (Osram 64222; Carl Zeiss Canada, Don Mills, Ontario) revealed the opacities to consist of multiple fine crystalline particles located in the superficial corneal stroma. Following application of 0.5% tropicamide (Mydriacyl; Alcon Canada, Mississauga, Ontario) indirect ophthalmoscopic (Heine Omega 200; Heine Instruments Canada, Kitchener, Ontario) examinations were completed bilaterally and abnormalities were not detected. A photograph of the right eye at presentation is provided for your assessment (Figure 1).

[学科分类] 兽医学