### module | sense | vision:

Good vision
* is an essential part of everyday life, particularly in the computer age
  - important for literacy skills, as well as children's development
  - more than just the ability to see clearly
* is the ability to identify, interpret, and understand what is seen
  - result of a proper focusing of sharp images onto the retina of the eye

Impaired vision
* is usually the first symptom most people notice.
* major contributing factor to falls among older adults
  - falls, especially among older adults

### module | sense | vision:

Loss of vision
* affects each person in unique and profound ways.
* can be permanent without immediate treatment
  - temporary or permanent
  - follow incisional eye surgery
  - occur rapidly
* can result from inflammation in the brain as well
  - in severely diminished quality of life
* caused by glaucoma is permanent.
* is preventable if the disease is detected early and treatment is started
  - the most feared complication of misdiagnosed or untreated temporal arteritis
  - usually very gradual and occurs over many years

### module | sense | vision:

Low vision
* affects every person differently
  - mostly older adults but can also be seen in other age groups
  - people at school, on the job, and at home
* affects people of all ages and backgrounds
  - can be caused by any condition that damages eyesight
  - ages, but is primarily associated with older people
* broad term used to describe the partial sight that many people have.
* can be due to heredity, an injury, disease, or aging.
* can redefine life in a way most people never see
  - ways that most people never see
* can result from a variety of diseases, disorders, and injuries that affect the eye
  - eye diseases or injuries to the eye
  - vary greatly due to individual situations
* has a variety of causes, including eye injury, diseases, and heredity.
* interferes with the performance of activities of daily living such as reading or driving.
* is caused by a number of disorders
  - most often due to a change in central vision
  - the result of disease, injury, or an anomaly of the visual system
  - used to describe a loss of visual acuity while retaining some vision
* problem of growing magnitude and gravity.
* redefines every dimension of life.
* refers to the students who can read some and see only with a large magnifying glass.
* results from a variety of conditions and disorders that affect the eye.

Machine vision
* can significantly reduce labor cost, minimize waste, and improve quality.
* is also a multi-faceted
  - especially concerned with the class of projective transforms
  - similar in complexity to voice recognition
  - the key to many manufacturing production, process, and automation needs
  - used in various industrial and medical applications
* plays a key role in automating the printer production process.

Night vision
* binoculars with built-in infrared illuminators for total darkness viewing.
* can also help firefighters see hot spots
  - work in two very different ways, depending on the technology used
* improves as healing progresses.
* is only possible if there are certain pigments present in the rods
* is, in itself, a complex physiological process.
* uses rods.

Normal vision
* depends upon the cornea staying clear, thin and smooth.
* requires all the cells in the retina to work together properly.