Diseases & Conditions > Presumed Ocular Histoplasmosis Syndrome

Presumed Ocular Histoplasmosis Syndrome in the eye causes loss of central vision. The Presumed Ocular Histoplasmosis Syndrome is a major cause of visual impairment in the central and eastern United States, especially in the Ohio and Mississippi River valleys. Histoplasma Capsulatum is a soil fungus that is acquired through the respiratory tract. This syndrome can result in abnormal blood vessels that can bleed and lift the retina, causing a decrease in vision. However, there are several treatment options available today that were not available five years ago. These include traditional laser treatment, photodynamic therapy, and submacular surgery. Treatment options vary according to the severity, size, and location of abnormal blood vessels.

Patients who have been diagnosed with presumed ocular histoplasmosis syndrome should check their vision every day to recognize any changes in their vision. The Amsler Grid is a useful tool for monitoring your vision. It is also important to see your retinal specialist on a regular basis to have a flourscein angiogram done to determine whether abnormal blood vessels are present.

POHS Right eye after photodynamic therapy. (Click the picture for enlargement.)

POHS Same patient, left eye. (Click the picture for enlargement.)

Normal Eye (Click the picture for enlargement.)