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. --.
Mild near sight is less than 2 diopters â you can see clearly out to 50 cm (about 20 inches) from your eyes. Medium degree of near sight would be between 2 and 4 diopters â you can see clearly out to between 25cm, approx 10â (4 diopters) and 50 cm. approx 20â (2 diopters).