Visual field

Visual field
Alternative Names:
Perimetry; Tangent screen exam; Automated perimetry exam; Goldmann visual field exam; Humphrey visual field exam
Normal Values: ...
Full article >>>

Visual Field
Alternate Names
: Automated Perimetry Exam, Goldmann Visual Field Exam, Humphrey Visual Field Exam, Perimetry, Tangent Screen Exam
Pictures & Images ...
Full article >>>

Visual field tests
Your complete visual field is the entire area seen when your gaze is fixed in one direction.
Full article >>>

Visual field restriction to 20 degrees diameter or less (tunnel vision) in the better eye.
Note that the definition of legal blindness differs from country to country and that the criteria listed above are for the US.
Full article >>>

Visual field abnormalities are much more common in children with CVI than realized probably because of the difficulties in assessing peripheral vision in children with poor fixation, poor orienting, and visually avoidant behaviors.
Full article >>>

Visual field test (perimetry)
Your visual field is the area in front of you that you can see without moving your eyes.
Full article >>>

Visual field tests (perimetry) can detect blind spots in a patient's field of vision before the patient is aware of them. Certain defects may indicate glaucoma.
Full article >>>

For example, if the retina detaches near the macula, the part of the eye that is responsible for the center of the visual field, then there may be a sudden, significant blurring or loss of vision.
Full article >>>

Adults will notice a loss of visual field because the upper portion of the eye is covered. Children who are born with a ptosis usually tilt their head back in an effort to see under the obstruction.
Full article >>>

Sometimes a migraine can cause symptoms such as visual field loss, numbness, or even weakness, just like a stroke. Although migraines can cause these nerve symptoms, do not assume a migraine is the cause.
Full article >>>

Abramson DH, Melson MR, Servodidio C: Visual fields in retinoblastoma survivors. Arch Ophthalmol 122 (9): 1324-30, 2004. [PUBMED Abstract]
Back to Top
Cellular Classification ...
Full article >>>

An examination may show changes in vision or visual fields, abnormal reflexes, abnormal eye movements, muscle weakness, decreased sensation, and other changes.
Full article >>>

In addition to the loss of optic nerve fibers, primary open-angle glaucoma is characterized by open anterior chamber angles, visual field abnormalities, and intraocular pressure that is too high for the continued health of the eye.
Full article >>>

However, loss of vision usually begins in a small area of the visual field in one eye and can rapidly expand to damage most or all of the vision of that eye. In the worst cases, total blindness develops.
Full article >>>

The optic chiasm, which supplies the nerve to the eyes, sits right, very close to the top of the pituitary gland. And if the pituitary gland enlarges, it can press on the optic chiasm and cause visual field problems.
Full article >>>


'"/>