Functional vision barriers: A new concept analyzed in terms of human visual performance.

Abstract

In this work we introduce a new category of barriers that we call "functional vision barriers." This expression refers to lighting and visual elements that may complicate or hinder functional vision and may make life even more difficult for people with visual defects. These barriers appear as a consequence of certain negative effects caused by the poor design of the visual stimulus or visual environment that surrounds it in which lighting is one of the main factors. We use the term "functional vision" because this expression refers to the ability of the visual system to perform everyday tasks. We analyzed some of our previous results with regard to situations that can be considered "functional vision barriers": (1) stimuli with low luminance contrast information in which the addition of chromatic contrast improves visual performance and (2) tasks that are performed in the presence of a glare source in the visual field, diminishing visual performance and reducing brightness perception.

Nuevo cuestionario de barreras físicas y actitudinales para personas con déficit visual: BAC-DV

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Electro-optic control of photographic imaging quality through ‘Smart Glass’ windows in optics demonstrations

“…Researchers have previously used different techniques to simulate light rays in an eye with a cataract on the lens. Some have studied image formation in an eye model using special glass plates with various fixed degrees of scattering [25][26][27]. This technique makes it very easy to alter the size and density of the scattering.…”

Transitional spaces from exterior to interior as functional vision barriers in ageing

“…1 Recently, a new category of barriers was proposed called 'functional vision barriers' referring to poor lighting design and visual elements -stimuli and surrounds -that may complicate or hinder functional vision. 2 A complementary concept was introduced in another paper 3 'the visual accessibility of a space' referring to the effectiveness with which vision can be used to travel safely through a space. Sagawa 4 introduced the concept of 'accessible design' to address the needs of people with special requirements, such as older people and people with disabilities, in the fields of light and lighting.…”