In psychology, visual perception is the ability to interpret information from visible light reaching the eyes. The resulting perception is also known as eyesight, sight or vision.
http://en.wikipedia.org/wiki/Visual_perception

The visual system is the part of the nervous system which allows organisms to see. It interprets the information from visible light to build a representation of the world ...
http://en.wikipedia.org/wiki/Visual

Design Windows Presentation Foundation (WPF) applications with built-in designer support. WPF Designer has snap lines for control margins and Event Tabs ...
http://www.microsoft.com/express/vcsharp/Default.aspx

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adjective . 1. of or pertaining to seeing or sight: a visual image. 2. used in seeing: the visual sense. 3. optical. 4. perceptible by the sense of sight; visible: a visual beauty.
http://dictionary.reference.com/browse/visual