Asteroid hyalosis

A degenerative condition of the eye

Asteroid Hyalosis

Asteroid hyalosis as seen in an eye examination.

Asteroid hyalosis is a degenerative condition of the vitreous body of the eye, characterized by the presence of small, white opacities. These opacities are composed of calcium-lipid complexes and are suspended within the vitreous humor, giving the appearance of "asteroids" floating in the eye.

Pathophysiology

Asteroid hyalosis is typically unilateral, meaning it affects only one eye. The exact cause of asteroid hyalosis is not well understood, but it is associated with aging and is more common in individuals over the age of 60. The condition is generally benign and does not usually affect vision.

The opacities are thought to be composed of calcium and phospholipids, and they are suspended in the vitreous gel. These particles are highly reflective, which is why they are easily seen during an eye examination.

Clinical Presentation

Patients with asteroid hyalosis are often asymptomatic, meaning they do not experience any symptoms. In some cases, patients may notice floaters, but these are usually not significant enough to impair vision. The condition is often discovered incidentally during a routine eye examination.

Diagnosis

Asteroid hyalosis is diagnosed through a slit lamp examination, where the opacities can be seen as small, white, spherical bodies within the vitreous humor. The condition can be distinguished from other vitreous opacities, such as those seen in vitreous hemorrhage or vitreous detachment, by its characteristic appearance and lack of associated symptoms.

Management

In most cases, no treatment is necessary for asteroid hyalosis, as it does not typically affect vision. However, if the opacities significantly impair vision or interfere with the examination of the retina, a vitrectomy may be considered. This surgical procedure involves the removal of the vitreous gel and the opacities within it.

Prognosis

The prognosis for individuals with asteroid hyalosis is excellent, as the condition is benign and does not usually progress to affect vision. Regular monitoring by an ophthalmologist is recommended to ensure that no other eye conditions develop.

Related pages

• Vitreous body
• Floaters
• Vitrectomy
• Ophthalmology