The prevalence rates of refractive errors among children, adolescents, and adults in Germany.

Purpose: The prevalence rates of myopia vary between 5% in Australian Aborigines to 84% in Hong Kong and Taiwan, 30% in Norwegian adults, and 49.5% in Swedish schoolchildren. The aim of this study was to determine the prevalence of refractive errors in German children, adolescents, and adults.

Vision restoration through extrastriate stimulation in patients with visual field defects: a double-blind and randomized experimental study.

Background: . Vision restoration therapy (VRT) to treat visual field defects used single-point visual stimulation in areas of residual vision up to now. The question arises if the efficiency of restoration can be increased when the entire region of blindness is trained by a visual stimulus aimed at activating extrastriate pathways (extrastriate VRT).

Vision- and health-related quality of life before and after vision restoration training in cerebrally damaged patients.

Purpose: The aim of the study was to examine if improvements of stimulus detection performance in visual field tests after intensive visual training of the visual field border zone in patients with visual field defects are associated with changes in self-reported vision- and health-related quality of life (QoL).

Methods: We studied a clinical sample of 85 patients suffering from visual field loss after brain damage that underwent repetitive, daily light stimulation (vision restoration training, VRT) of the visual field border and the blind visual field for up to 75 hrs (N=16) or 150 hrs (N=69). Stimulus detection was quantified in the central visual field with a campimetric method before and after intervention.

Influence of uncorrected ametropia on computer-based perimetry in patients with visual field defects and normal subjects.

Background: During perimetric testing it is well known to wear spectacles. But less is known about to what extent refractive errors affect the response time performing computer-based visual tasks.

Methods: Patients with visual field defects (VFD) (n = 6) and normal control subjects (n = 6) performed computer-based high resolution perimetry (HRP) with and without the use of spectacles.