Visual field size criteria for mobility rehabilitation referral.

Purpose: To investigate evidence-based visual field size criteria for referral of low-vision (LV) patients for mobility rehabilitation.

Methods: One hundred and nine participants with LV and 41 age-matched participants with normal sight (NS) were recruited. The LV group was heterogeneous with diverse causes of visual impairment.

Macular structure and vision of patients with macular heterotopia secondary to retinopathy of prematurity.

Purpose: To examine if vision in subjects with macular heterotopia (MH) secondary to retinopathy of prematurity (ROP) is related to anatomical macular structure.

Methods: Six subjects with MH who were between 18 years and 65 years of age and three age-matched subjects with normal vision were recruited for the study. Vision and macular structure of the better eye of the subjects with MH and the dominant eye of age-matched subjects with normal vision were assessed.

Vision and self-reported mobility performance in patients with low vision.

Background: As vision plays a significant role in mobility performance, it is usual to refer low vision patients, particularly those who complain of mobility difficulties, for orientation and mobility (O&M) training to help them maintain safe independent travel. Our study aimed to determine whether there was a relationship between measures of vision and self-reported mobility, and the applicability of a patient-based mobility assessment in patients with heterogeneous causes of visual loss.

Method: We assessed the high and low contrast visual acuity, visual field and scanning ability of 30 patients with low vision.

Facilitation of contrast detection in near-peripheral vision.

Foveal detection of a Gabor patch (target) is facilitated by collinear, displaced high-contrast flankers. Polat and Sagi reported that the same phenomenon occurred in the periphery, but no data were presented [Proc. Natl.

Preferred walking speed for assessment of mobility performance: sighted guide versus non-sighted guide techniques.

BACKGROUND: If visually impaired people had their sight fully restored, it is assumed that they would walk at their optimal speeds. Previous mobility studies have used preferred walking speed (PWS) to measure walking efficiency of visually impaired adults. Therefore, the actual speeds that visually impaired people adopt on a route can be expressed as a percentage of their preferred walking speed (PPWS).