ASTEROID HYALOSIS IN DOGS: DEFINITION, CLINICAL FEATURES, DIAGNOSIS, AND TREATMENT STRATEGIES

Asteroid hyalosis is a degenerative condition of the eye characterized by small white opacities in the vitreous humor. It is known to occur in humans, dogs, cats, horses, and chinchillas. Clinically, these opacities are quite refractive and give the appearance of twinkling stars in the night sky, but intraocular asteroids are typically quite mobile. While the exact cause of asteroid hyalosis is not fully understood, it has been associated with diabetes mellitus, hypertension, hypercholesterolemia, and ciliary body tumors in certain animals. In dogs, asteroid hyalosis is particularly considered an age-related change. Asteroid bodies are composed of hydroxyapatite consisting of calcium and phosphate or phospholipids. Asteroid hyalosis generally does not have a significant impact on vision, but it can significantly obstruct the visualization and examination of the retina. Treatment for asteroid hyalosis is generally not necessary, but vitrectomy may rarely be required for both diagnostic and therapeutic purposes.

This report aims to provide an in-depth understanding of the definition, clinical features, pathological mechanisms, potential causes, diagnostic methods, and treatment strategies of asteroid hyalosis. This will contribute to a better understanding of this ocular condition and aid in the development of appropriate management strategies in the future.