A 26 years old female patient was examined twenty-four hours after observing laser-induced plasma formation in a process of nanoparticle production complaining of bilateral central scotoma. The ophthalmologic evaluation included dilated fundus observation, fluorescein angiography, and optical coherence tomography (OCT). In the first assessment, visual acuity was 20/20 in the right eye and 20/25...

PURPOSE To report high resolution spectral domain optical coherence tomography (SD-OCT) findings in a case with bilateral photic maculopathy and resultant central scotoma following pterygium excision. CASE REPORT A 38-year-old man with a history of pterygium excision complained of visual disturbance and annoying central scotoma in both eyes. Although he had subtle funduscopic and angiographic...

Unilateral central or centrocaecal scotoma may result from optic nerve compression. However, such defects bilaterally usually indicate non-compressive optic neuropathy of toxic or nutritional, hereditary, or demyelinating origin. Three cases are reported of patients who presented with somewhat atypical bilateral central or centrocaecal scotomata and were found to have suprasellar mass lesions d...

Purpose People with central field loss (CFL) lose information in the scotomatous region. Remapping is a method to modify images to present the missing information outside the scotoma. This study tested the hypothesis that remapping improves reading performance for subjects with simulated CFL. Methods Circular central scotomas, with diameters ranging from 4° to 16°, were simulated in normally ...

Subjects develop a preferred retinal locus of fixation (PRL) under simulation of central scotoma. If systematic relocations are applied to the stimulus position, PRLs manifest at a location in favor of the stimulus relocation. The present study investigates whether the induced PRL is transferred to important visual tasks in daily life, namely pursuit eye movements, signage reading, and text rea...

Poor fixation stability is one of the primary challenges to high-resolution in vivo imaging of human retina in cases of central vision loss. We tested the hypothesis that careful design of fixation targets may improve fixation stability. The ability to fixate on a visual target was measured by an eye-tracking camera. In participants without eye disease, target type, target-to-scotoma size ratio...

Central or paracentral scotoma is an occasional manifestation of certain space-occupying intracranial lesions. The reason for the development of this defect is not yet clear. Traquair (1946) defines a scotoma as " an area of depressed vision within the field margin surrounded by an area of less depressed or normal vision." Either a depressed area or a channel of varying width may connect the sc...

Are silencing, ectopic shifts, and receptive field (RF) scaling in cortical scotoma projection zones (SPZs) the result of long-term reorganization (plasticity) or short-term adaptation? Electrophysiological studies of SPZs after retinal lesions in animal models remain controversial, because they are unable to conclusively answer this question because of limitations of the methodology. Here, we ...

Patients with a scotoma in their central vision (e.g., due to macular degeneration, MD) commonly adopt a strategy to direct the eyes such that the image falls onto a peripheral location on the retina. This location is referred to as the preferred retinal locus (PRL). Although previous research has investigated the characteristics of this PRL, it is unclear whether eye movement metrics are modul...