The review also found that EV training is more effective than provision of magnifiers alone for improving near visual acuity in individuals with an absolute central scotoma
Central visual field characteristics, including fovea and central scotoma
characteristics, were measured with a scanning laser ophthalmoscope (SLO) (model 101, Rodenstock; Munich, Germany).
When a central scotoma
impairs the ability of the fovea to distinguish detail, one or more preferred retinal loci (PRL) (Schuchard & Raasch, 1992; von Noorden & Mackensen, 1962; White & Bedell, 1990), also known as pseudo-foveas (Guez, Le Gargasson, Rigaudiere, & O'Regan, 1993), naturally develop at eccentric retinal locations and become the new points of fixation.
However, her vision deteriorated to count fingers vision (near) in the right eye, in which there was a dense central scotoma
He had no neurological signs on examination, but ophthalmological assessment found a large upper central scotoma
on the right side.
All patients recovered visual acuity to 20/30 or better with residual central scotoma
by 12 weeks.
The left eye also exhibited a large central scotoma
, dyschromatopsia, and a left afferent pupillary defect.
Three days after exposure, a central scotoma
and decreased visual acuity developed in the right eye.
Additional key words were added as the search progressed and reviewers provided feedback: peripheral vision, eccentric viewing, video training, central scotoma
, macular degeneration, AMD, Stargardt's disease, vision rehabilitation, eccentric fixation, and preferred retinal locus (PRL).
The visual acuity requirement comprised better than 20/400 Snellen equivalent and a documented central scotoma
in the better-seeing eye.
The mean age of these patients was 32 (range 16-45); 19 of them had blurring of vision, while others complained of central scotoma
, floaters, photophobia, or halo vision.
Damage to this area from diseases, such as age-related macular degeneration (AMD), causes the loss of central vision in the form of a central scotoma