INFORMATION FOR - General Public
What is the difference between a complete eye examination and a sight test?

A complete eye exam, as performed by an optometrist, examines the entire eye and visual system including:
  • the internal and external ocular health of the eye
  • the central and peripheral sensory function of the eyes
  • the integrity of the visual pathway
  • the objective and subjective refractive status of the eye including visual acuities at near and far
  • the binocular and accommodative function of the eyes
  • the visual processing of information
  • other signs of systemic disease or disorders
By examining the total vision system, optometrists can diagnose eye diseases and disorders such as glaucoma, cataracts, retinal conditions and other conditions requiring eyeglasses or contact lenses. In addition, a complete eye exam also identifies systemic conditions such as diabetes, high blood pressure and brain tumors.

A sight test, or objective refraction, is just one small part of a complete eye exam. It does not assess or examine all other aspects of the human eye or other causes that may give rise to vision impairment or eye disease.

Having 20/20 vision, with or without the use of corrective lenses, does not mean that the eyes are healthy. Many eye diseases do not manifest any pain, redness or other outward sign until irreparable damage has occurred.