Fifty-year-old James recently purchased bifocals. When he looks straight out at distant objects he looks through a portion of his lens that has a power of -3.0 diopters. When he looks down at his book to read he looks through a portion of his lens that has a power of 1.5 diopters.

What is the focal point of the upper portion of James' lenses? Is it a converging or diverging lens?

What is the focal point of the lower portion of James' lenses? Is it a converging or diverging lens?

Where is James' near point without his lenses?

Where is James' far point without his lenses?

What condition(s) does James most likely have? Explain.