title: Bilateral eccentric vision training on pseudovitelliform dystrophy with microperimetry biofeedback.
abstract: Low vision patients with eccentric viewing (EV) use extrafoveal retinal areas to compensate for the loss of central vision. Such retinal loci are known as the preferred retinal locus (PRL). It is known that EV is accompanied by unstable fixation. Microperimetry systems with biofeedback training have been used as a rehabilitation aid to improve fixation stability in EV patients. Normally, only the best or dominant eye is selected for such rehabilitation. This case report describes the rehabilitation on both eyes by means of PRL relocation with MAIA microperimetry (Centervue, Padova, Italy) with biofeedback training technology of a 74-year-old woman diagnosed with adult pseudovitelliform dystrophy. The patient presented binocularly similar anatomical and functional characteristics with the PRL located over the dystrophic area. At the end of the 3 months rehabilitation period, the PRL was successfully relocated inferiorly from the fovea showing relevant visual acuity improvement.
authors.affiliation: Academic Ophthalmology Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK.
authors.forename: Marco Ulises
authors.identifier: http://orcid.org/0000-0002-1508-2753
authors.initials: MU
authors.lastname: Morales
authors.affiliation: Academic Ophthalmology Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK.
authors.forename: Saker
authors.initials: S
authors.lastname: Saker
authors.affiliation: Academic Ophthalmology Division of Clinical Neuroscience, University of Nottingham, Nottingham, UK.
authors.forename: Winfried M
authors.initials: WM
authors.lastname: Amoaku
mesh_terms: D000368:Aged; D001676:Biofeedback, Psychology / Q000379:methods*; D005260:Female; D006801:Humans; D015354:Vision, Low / Q000209:etiology / Q000534:rehabilitation*; D014792:Visual Acuity; D014794:Visual Fields; D057826:Vitelliform Macular Dystrophy / Q000150:complications / Q000534:rehabilitation*