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. --.
Types of Lenses. Most computers are distanced at 20 to 26 inches from the userâs eyes, and this is considered to be the intermediate zone. However, just like in regular glasses, not everyoneâs eyes are the same in each zone. Single vision computer glasses reduce the risk of blurred vision, eye strain, and bad posture.