Korean J Ophthalmol.  2011 Dec;25(6):409-416. 10.3341/kjo.2011.25.6.409.

A Study of Eccentric Viewing Training for Low Vision Rehabilitation

• Jeong JH
• Moon NJ

• KMID: 1031188
• DOI: http://doi.org/10.3341/kjo.2011.25.6.409

Abstract

PURPOSE
The definition of eccentric viewing (EV) is using non-foveal preferred retinal loci (PRL) for viewing. The purpose of the present study was to investigate the clinical effect of EV training for low vision rehabilitation in patients with central scotomas.
METHODS
The direction of EV was monitored in 30 low vision patients with central scotomas by moving the patient's view. The PRL was found by using a direct ophthalmoscope and retinal camera; the preserved visual field was identified using a kinetic visual field analyzer. The relationships between EV, PRL, and visual field were evaluated. The patients and their guardians were educated regarding EV. After 2 weeks of self-training, maintenance of EV was checked and changes in best-corrected visual acuity (BCVA), reading speed, and satisfaction questionnaire were evaluated.
RESULTS
A relationship between EV, PRL, and visual field was in accordance in half of the patients. There were no significant differences in demographics and basic visual characteristics in patients where the relationship was not in accordance. EV was maintained in two-thirds of the patients, but there were no significant differences in demographics and basic visual characteristics in patients who discontinued EV. There were no significant improvements in BCVA; however, reading speed and the satisfaction scores increased significantly with EV.
CONCLUSIONS
The direction of EV was effectively detected by convenient access using an inexpensive method. Functional vision and satisfaction significantly improved following EV training. EV training can be used as an effective method for low vision rehabilitation in patients with central scotomas.

Keyword

Eccentric viewing; Low vision rehabilitation; Preferred retinal locus; Reading speed; Scotoma

MeSH Terms

Adolescent
Adult
Aged
Aged, 80 and over
Female
Humans
Male
Middle Aged
Patient Satisfaction
Questionnaires
Reading
Rehabilitation/*methods
Scotoma/physiopathology/*rehabilitation
Vision, Low/physiopathology/*rehabilitation
Visual Acuity/physiology
Young Adult

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