However, despite resolution of ocular signs, all reported residual mild central scotoma
that was reflected on HVF as an area of subtle decrease in sensitivity in the central vision (Figure 1).
Scanning characters and reading with a central scotoma
For individuals with central scotomas
, using an eccentric retinal area for visual tasks is necessary, because visual tasks such as fixation and reading can no longer be performed effectively with the foveal area .
Low vision practitioners commonly use the Bjerrum tangent screen as a method of mapping the central visual field or the central scotoma
Visual field defects in nonarteritic anterior ischemic optic neuropathy (NA-AION) include altitudinal field defect (classically occurring in the inferior hemi field), central scotoma
, arcuate scotoma, and quadrantic defects.
Dengue fever can lead to visual impairment in the form of blurring of vision (most common), central scotoma
, micropsia/metamorphosia, floaters, visual field defect, near vision disturbance, impairment of color vision, ocular pain and redness visual field defect, detectable by ophthalmological exams such as angiography, retinography and OCT imaging, as well as retinal and cortical electrophysiology.
In an eye with a central scotoma
affecting the entire fovea, one or more eccentric PRLs naturally and reliably develop [5-7,15-17].
A computer-and-video display-based system for training eccentric viewing in macular degeneration with an absolute central scotoma
d Central scotoma
, reduced visual acuity and metamorphopsia are some of the symptoms of this condition
27,28) Observation of an OCT image of a full thickness macular hole makes it easy to understand why patients experience a central scotoma
and distortion due to absence of photoreceptors in the centre of the hole and the presence of a cystic fluid in the cuffs, respectively.
Scanning characteristics and reading with a central scotoma
18) Visual acuity is typically 6/36-6/60 in these individuals, with an absolute central scotoma
, severe photophobia and nystagmus.