Eye Conditions

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Halo
A hazy ring around bright light, seen by some patients with a refractive error.

Herpes Simplex
A virus, the most common cause of serious corneal infections.

Herpes Zoster
Herpes zoster is the medical name for shingles. The eyes are sometimes affected by herpes zoster because the eyes are connected to nerves that may be infected with the herpes zoster virus. The usual shingles rash can spread from an involved area of the forehead or cheek to the upper or lower eyelids. Shingles may cause redness of the conjunctiva (the mucous membrane covering the white of the eye). It can also cause small scratches or scarring of the cornea. The scratches on the cornea may increase the risk of bacterial infection in the eye. Shingles may also cause inflammation inside the eye, known as iritis or uveitis. It can also affect the optic nerve or the retina.

Histoplasmosis
Ocular Histoplasmosis is caused by a fungus commonly found in the dust and soil of the Mississippi-Ohio River Valley region. Approximately 62% of the adult population living in this region are carriers. It affects men and women equally.

Hyperopia
Also called farsightedness. Condition in which the length of the eye is too short, causing light rays to focus behind the retina rather than on it, resulting in blurred near vision. Additional symptoms include eyestrain and squinting.

Hyphema
Bleeding as from injury into the anterior segment of the eye. Sometimes can be visualized with the naked eye coloring the front of the eye a red or rusty color and obscuring transmission of light past the pupil.