The eye must be able to change its refractive properties to focus images of both distant and nearby objects on the retina. Distant objects (greater than 30 feet or 9 meters away from the eye) emit or reflect light that can be focused on the retina in a normal relaxed eye (Figure 14.8).
Ramona is a census-designated place (CDP) in San Diego County, California. The population was 20,292 at the 2010 census. The term Ramona also refers to an unincorporated community (with some plans to incorporate) that includes both the Ramona CDP and the adjacent CDP of San Diego Country Estates.
The Town of Danville is located in the San Ramon Valley in Contra Costa County, California. It is one of the incorporated municipalities in California that uses town in its name instead of city. The population was 42,039 in 2010. Danville hosts a farmer's market each Saturday next to the San Ramon Valley Museum. The Iron Horse Regional Trail runs through Danville. It was first a railroad that has been converted to an 80-foot wide corridor of bike and hike trails as well as controlled interse