Jesus is talking to a group of people about what might happen to them as individuals. The instances of "you" and "your" are all singular, but you may need to translate them as plurals. (See: [[rc://en/ta/man/translate/figs-you]])
This compares healthy eyes that allow a person to see to diseased eyes that cause a person to be blind. This is a metaphor referring to spiritual health. Often Jewish people used the phrase "bad eye" to refer to greed. The meaning is: if a person is completely devoted to God and sees things the way he does, then they are doing what is right. If a person is greedy for more, then he is doing what is evil. (See: [[rc://en/ta/man/translate/figs-metaphor]])
This metaphor means the eyes allow a person to see just as a lamp helps a person see in the dark. AT: "Like a lamp, the eye allows you to see things clearly" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Both of these phrases mean basically the same thing. They emphasize that a person cannot love and be devoted both to God and money at the same time. (See: [[rc://en/ta/man/translate/figs-parallelism]])