A comprehensivs eye exam involves several groups of tests: refractive status, oculomotor skills, assess binocularities, and ocular health. Refraction determines what power is needed to see 20/20 at distance and near. After a certain age (eg 40 and up), the power to see well at distance will be different than the power for reading. That is when bifocal/multifocal is introduced. Oculomotor refers to how eyes muscles move, track, team, and focus. Binocularity is to assess if the brain take in information from two eyes. This is to check presence of double vision, suppression, and misalignment. Eye pressure, stereo vision, color vision, and automated visual field are all tested to ensure the health and good function of visual system. A dilated fundus exam will allow detecting of some retinal disease that can otherwise be unnoticed due to lack of symptoms.