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Optic nerve melanocytoma does not usually produce symptoms or grow. If they slowly grow, optic nerve melanocytoma can produce afferent pupillary defects (30%), subretinal fluid (10%), and an enlarged blind spot (75%). On fundoscopic exam, the optic disc may be swollen, atrophic, or even normal. [1] Central retinal vein occlusion may occur.
Optic nerve sheath meningiomas (ONSM) are rare benign tumors of the optic nerve. 60–70% of cases occur in middle age females, and is more common in older adults (mean age 44.7 years). It is also seen in children, but this is rare. The tumors grow from cells that surround the optic nerve, and as the tumor grows, it compresses the optic nerve.
Coloboma of optic nerve is a rare defect of the optic nerve that causes moderate to severe visual field defects. Coloboma of the optic nerve is a congenital anomaly of the optic disc in which there is a defect of the inferior aspect of the optic nerve. The issue stems from incomplete closure of the embryonic fissure while in utero.
Optic nerve (the nerve that connects the eye to the brain) A person can have coloboma in one or both eyes, and they may impact vision, depending on where they’re located, the U.S. National ...
An eye neoplasm is a tumor of the eye. [1] A rare type of tumor, [2] eye neoplasms can affect all parts of the eye, and can either be benign or malignant , in which case it is known as eye cancer. [3] Eye cancers can be primary (starts within the eye) or metastatic cancer (spread to the eye from another organ
What is "Take My Tumor"? In the series that first aired on April 3, three world-renowned surgeons — Osborne, Dr. Kimberly Moore Dalal and Dr. Jason Cohen — work each episode to help a variety ...
Tumors growing in the inner wing most often cause direct damage to the optic nerve leading especially to a decrease in visual acuity, progressive loss of color vision, defects in the field of vision (especially cecocentral), and an afferent pupillary defect. If the tumor continues to grow and push on the optic nerve, all vision will be lost in ...
NAION is believed to be caused by reduced blood flow to the optic nerve head. It can lead to permanent visual loss in one eye that may develop painlessly and suddenly or over several days before ...