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  2. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    Normally, visual acuity refers to the ability to resolve two separated points or lines, but there are other measures of the ability of the visual system to discern spatial differences. Vernier acuity measures the ability to align two line segments. Humans can do this with remarkable accuracy. This success is regarded as hyperacuity.

  3. Visual perception - Wikipedia

    en.wikipedia.org/wiki/Visual_perception

    Leonardo da Vinci: The eye has a central line and everything that reaches the eye through this central line can be seen distinctly. Alhazen (965 – c. 1040) carried out many investigations and experiments on visual perception, extended the work of Ptolemy on binocular vision, and commented on the anatomical works of Galen.

  4. Color vision - Wikipedia

    en.wikipedia.org/wiki/Color_vision

    Color vision, a feature of visual perception, is an ability to perceive differences between light composed of different frequencies independently of light intensity. Color perception is a part of the larger visual system and is mediated by a complex process between neurons that begins with differential stimulation of different types of ...

  5. Visual system - Wikipedia

    en.wikipedia.org/wiki/Visual_system

    The visual system is the physiological basis of visual perception (the ability to detect and process light).The system detects, transduces and interprets information concerning light within the visible range to construct an image and build a mental model of the surrounding environment.

  6. Optics and vision - Wikipedia

    en.wikipedia.org/wiki/Optics_and_vision

    Visual perception is the ability to interpret information and surroundings from visible light reaching the eye. The resulting perception is also known as eyesight , sight or vision . The various physiological components involved in vision are referred to collectively as the visual system , and are the focus of much research in psychology ...

  7. Eye examination - Wikipedia

    en.wikipedia.org/wiki/Eye_examination

    An eye examination, commonly known as an eye test, [1] is a series of tests performed to assess vision and ability to focus on and discern objects. [2] It also includes other tests and examinations of the eyes. [2] Eye examinations are primarily performed by an optometrist, ophthalmologist, or an orthoptist.

  8. Depth perception - Wikipedia

    en.wikipedia.org/wiki/Depth_perception

    Perspective, relative size, occultation and texture gradients all contribute to the three-dimensional appearance of this photo. Depth perception is the ability to perceive distance to objects in the world using the visual system and visual perception.

  9. Infant visual development - Wikipedia

    en.wikipedia.org/wiki/Infant_visual_development

    Visual acuity, the sharpness of the eye to fine detail, is a major component of a human's visual system. It requires not only the muscles of the eye – the muscles of orbit and the ciliary muscles – to be able to focus on a particular object through contraction and relaxation, but other parts of the retina such as the fovea to project a ...