Eye Conditions Associated with Blindness N-P

Non-24-Hour Sleep Wake Disorder

Non-24-Hour Sleep-Wake Disorder in Children Does your child have total blindness and difficulties sleeping at night? Do they have trouble staying awake during the day? Are they always sleepy during the day? If you answered yes to these questions, your child might have a circadian rhythm disorder called Non-24-Hour Sleep-Wake Disorder (Non-24). What Is Non-24? […]

Norrie Disease

What Is Norrie Disease? Norrie disease is an inherited condition found in males and characterized by an abnormal or immature retina (light-sensitive nerve tissue lining the back of the eyes) and possible deteriorating irises (colored portion of the eyes) and eyeballs. The baby will be born blind or develop severe vision loss soon after birth. […]

Close up of child’s with albinisms eyes.

Nystagmus

What Is Nystagmus? Nystagmus is a condition involving involuntary, rapid, and repetitive movements of one or both eyes vertically, horizontally, or in a circular motion. This may be present at birth or, less commonly, may result from disease or injury. Nystagmus is most often a symptom of an eye disorder or neurological issue. How Is […]

Optic Nerve Atrophy

What Is Optic Nerve Atrophy? Optic nerve atrophy (ONA) is degeneration of, or damage to, the optic nerve, a cluster of nerves that carry vision information from the eye to the brain. Causes of ONA include heredity, trauma (including stroke), a tumor, a decrease in oxygen or blood supply, infections, or disorders. The effects of […]

Nature blurred background- branches and flowers.

Optic Nerve Hypoplasia (ONH)

What Is Optic Nerve Hypoplasia (ONH)? Optic nerve hypoplasia (ONH) is a condition present at birth, characterized by an underdeveloped or absent optic nerve (bundle of nerves that transmit messages between the eyes and the brain). The effects of optic nerve hypoplasia have a broad range dependent on the adequacy of visual messages sent from […]