Skip navigation


DB iconVision

Diagram of the eye

Vision is the ability of the brain to process information received from the eyes.

The eye receives light and transforms it into electric signals that are sent along the optic nerve to the brain.

Vision problems are grouped into six categories:

  • Acuity loss
  • Field loss
  • Oculomotor problems
  • Reduced contrast sensitivity
  • Reduced or absent color sensitivity
  • Processing disorders or cortical visual impairment (CVI)

Vision professionals include:

Young boy having his vision tested
  • Ophthalmologist
  • Optometrist
  • Optician
  • Orthoptist
  • Ocularist
  • Low vision specialist
  • Teacher of the visually impaired
  • Orientation and mobility specialist

Individuals who are visually impaired typically rely on their sense of hearing to understand the environment.

When these individuals also have a hearing loss, they must rely more on touch, taste, and smell - senses that don't detect information from a distance.