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Related to visual field: perimetry, visual acuity, Visual pathway
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References in periodicals archive ?
The second research question is related to the type of visual field defect.
11 Where in the visual pathway would you expect a lesion to cause a visual field defect of this type?
The spatial pattern was a 24 x 24 array of isolated-checks to subtend a 11[degrees] visual field at a testing distance of 114 cm, and a fixation cross-cue facilitated careful fixation on the center of the screen [Figure 2].[8]{Figure 2}
The second is, 'Despite the control of the IOP, is there still a loss of visual field?' Central Visual Field (CVF) would tell.
According to the ophthalmological examination protocol, all patients were subjected to visual acuity test using Snellen chart; ocular tension measurement using Goldmann applanation tonometer; biomicroscopic examination; central 10-degree visual field test using Octopus 900 (Interzeag AG, Schlieren-Zurich, Switzerland); fundus autofluorescence photography and color fundus photograph examination using Visucam NM/FA (Carl Zeiss, Germany), and macular RGC-IPL thickness and peripapillary retinal nerve fiber layer (RNFL) thickness measurements using Cirrus high-definition OCT, model 5000 (Carl Zeiss Meditec Inc., Jena, Germany).
Since local visual field defects were recovering to normal within 3 months after the operation in the previous study [7], we evaluated glaucomatous progression until 3 months after the operation.
Pre-treatment, the visual acuity was 20/350 OD and 20/70 OS with severe visual field loss OU.
Visual field defects such as decreased retinal sensitivity prevailed in the eyes with POAG, whereas in the eyes with NAION they were mostly manifested as concentrically narrowed visual field and quadrant excesses.
Glaucoma is characterised by progressive degeneration of retinal ganglion cells and their axons that lead to nerve fiber layer loss, optic disc cupping and consecutive glaucomatous visual field changes and among these retinal nerve fiber layer (RNFL) loss is considered an early sign of glaucoma.
Visual field examination showed diffuse constriction of peripheral visual field and a greatly damaged central visual field (Figures 4(a) and 4(c)).
Prior to prism placement, a full visual field test is completed using a Zeiss, Octopus, or Goldman perimeter, which accurately define the visual field loss.