New Connecting Kids to Coverage Outreach Video. Learn about Las Vegas, Nevada's Foundation for Positively Kids outreach efforts using their network of community-based, school-based, and specialty health care clinics.
Young adults with 20/20 vision can often focus at 4 to 6 inches. At 6 inches, they can see detail at 600 pixels per inch or 300 line pairs per inch. As you age, your lenses become less resilient and the focus distance increases. At about 50 years, the average minimum focus distance is about a foot corresponding to 150 line pairs per inch or 300 pixels per inch. These numbers reflect good light and high contrast scenes. Generally, under more typical conditions, people don't see this well. --.
The field of vision is defined as the area that is perceived simultaneously by a fixating eye. The limits of the normal field of vision are 60 degrees into the superior field, 75 degrees into the inferior field, 110 degrees temporally, and 60 degrees nasally (Fig. 1). Fig. 1. Limits of the normal visual field, right eye: 60 degrees superiorly, 75 degrees inferiorly, 110 degrees temporally, and 60 degrees nasally.