A comprehensive examination of a person’s visual functioning would include the following:
• Detailed history of any eye complaints, surgery, therapy and medication
• Assessment of visual acuities (clarity of vision)
• Binocularity tests to assess how the eyes work together as a team, and how the eyes aim and focus together
• Refraction to determine if any optical correction (near-sightedness, far-sightedness, astigmatism, etc) is required
• Internal and external eye examination to asses the health of the eye
• Measurement of intra-ocular eye pressures
Should contact lenses be required, further measurements of corneal curvatures will be done.
The goal of the assessment should be to determine whether the visual system is processing information effectively. Because normal vision guides us in what we do in everyday life (especially at work or school where visual demands are high), the majority of the examination should be completed under natural conditions.
Eye examinations for children would involve further testing of binocularity and visual perceptual skills. See our Children’s Vision section for further details.
What is Vision?
Vision is a cognitive act which enables us to look at an object and not only identify it, but to determine where it is, its size, its distance from the observer, its rate of movement, its texture, and everything else that can be determined by visual inspection. Eyesight, which involves the sensory ability of the eye to distinguish small details, is only one component of vision.
It has been estimated that 75 to 90% if all classroom learning comes to the student via the visual pathways. If there is any interference with these pathways, the student will probably experience difficulty with learning tasks.