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2. Adaptation (eye) - Wikipedia

   en.wikipedia.org/wiki/Adaptation_(eye)

   In visual physiology, adaptation is the ability of the retina of the eye to adjust to various levels of light. Natural night vision, or scotopic vision, is the ability to see under low-light conditions. In humans, rod cells are exclusively responsible for night vision, as cone cells are only able to function at higher illumination levels. [1]

3. Accommodation reflex - Wikipedia

   en.wikipedia.org/wiki/Accommodation_reflex

   Light from a single point of a distant object and light from a single point of a near object being brought to a focus. The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape (accommodation) and pupil size.

4. Accommodation (vertebrate eye) - Wikipedia

   en.wikipedia.org/wiki/Accommodation_(vertebrate_eye)

   Arguably, it may increase the depth of field by reducing the aperture of the eye, and thus reduce the amount of accommodation needed to bring the image in focus on the retina. [48] There is a measurable ratio (Matthiessen's ratio) between how much convergence takes place because of accommodation (AC/A ratio, CA/C ratio).

5. Vision rehabilitation - Wikipedia

   en.wikipedia.org/wiki/Vision_rehabilitation

   Vision rehabilitation (often called vision rehab) is a term for a medical rehabilitation to improve vision or low vision.In other words, it is the process of restoring functional ability and improving quality of life and independence in an individual who has lost visual function through illness or injury.

6. Visual acuity - Wikipedia

   en.wikipedia.org/wiki/Visual_acuity

   A reference value above which visual acuity is considered normal is called 6/6 vision, the USC equivalent of which is 20/20 vision: At 6 metres or 20 feet, a human eye with that performance is able to separate contours that are approximately 1.75 mm apart. [9] Vision of 6/12 corresponds to lower performance, while vision of 6/3 to better ...

7. Vision therapy - Wikipedia

   en.wikipedia.org/wiki/Vision_therapy

   Vision therapy is a subset of behavioral optometry. In general, vision therapists attempt to improve the vision, and therefore day-to-day well-being, of patients using "eye exercises," prism, and lenses, with more emphasis on the patient's visual function.