Half Head Highlights 2010

is the total area in which an object can be seen in peripheral vision while the eye is focused on a central point. Visual field means the space that captures the eye when we keep our gaze fixed on a punto.Se should measure the visual field of each eye separately and then the binocular because there may be defects in the monocular visual fields and not be detected if makes only the binocular as there is a central field of about 60 ° which are seen by both eyes simultaneously so that any reduction to occur in this area can be supplied by the other eye, as long as it concerned a single eye, these cases the impact on driving may not be very importante.SERÁ MORE IMPORTANT WHEN THE VISUAL IMPACT disruption of the temporal side there, especially if they are large or when there is loss of one quadrant of the field, half of the field or a general reduction of all meridianos.EL FIELD VISUAL is normal if the patient sees a stimulus to 90 ° in the temporal side at 60 ° on the nasal side and 50 º upwards and 70 º to abajo.FORMAS WHERE YOU CAN MAKE
Review perimetry visual field confrontation. It is a quick and basic evaluation of visual field done by an examiner sitting directly in front. For this test, the examiner covers one eye of the patient and I asked to look into my eyes and tell when you can see his hand. Review
tangent screen visual field. The patient should sit about 1 meter (3 feet) away from a screen with a target in the center, to which should look and indicate the time that captures an object placed in their peripheral vision. Finally we made a map of the degree of peripheral vision.
automated perimetry. The patient sits in front of a concave dome and stare at a central target within the dome. A computer program flashes small lights at different places on the surface of the dome and the patient presses a button to indicate that detected the small lights in your peripheral vision. Patient responses were compared with control groups of equivalent ages for the presence of visual field defects. FIELD AMPLITUDES
VISUAL.El normal visual field is normally the following amplitude, and from the midline of the eyes ... The visual fields of each eye overlap and allow a vision binocular.Hacia lateral regions, the vision is monocular.La area of \u200b\u200bthe macula in the retina is what allows sharper vision. It is located just lateral to the entrance of the optic nerve. If the macula becomes ill, vision compromete.CONOCER Visual field length is important because it can Neurological disorders reflect that some assets, thus:
The impact generalized and / or concentric visual field occurs on: retinitis pigmentosa, glaucoma, cataracts, age, use of corrective lenses for certain high ametropia, retinal detachment (even if cured, etc.).
sectoral constraints and cuadrantopnosias hemianopsia, are caused by brain tumors (pituitary, etc), head injury, stroke, etc. ..
field circumscribed deficit occurs in glaucoma, retrobulbar neuritis, macular degeneration, vascular disorders, damage to the retina, etc. .. These deficits are often not impact provided that is not affected central vision and visual field of the other eye. VISUAL FIELD CHANGES
. HEMIAPNOSIA
namesake of a LADO.En each eye vision commits the same hemifield (eg, left homonymous hemianopsia). This finding points to a lesion in the hemisphere opposite the visual field deficit (defect in the optic radiation or occipital cortex). HEMIAPNOSIA
BITEMPORAL.Existe a time commitment of both hemifields. This suggests a break in the fiber decussation at the optic chiasm (eg, a pituitary tumor that has grown up). Quadranopsia
HOMÓNIMA.En each eye's vision is compromised same hemifield but partially and in the same quadrant. The explanation is similar to the case of homonymous hemianopsia, but with injury to a lesser extent.
AMAUROSIS.Si the lesion affects the optic nerve, amaurosis will occur in that eye.
( http://centros-psicotecnicos.es/exploracion-oftalmologica/campo-visual/gmx-niv37-con17.htm )