Jesus continues his parable, in which he speaks of his teaching as light that he wants his disciples to obey and share with others. He speaks of people who do not know or accept his teaching as being in darkness. (See: [[rc://en/ta/man/translate/figs-metaphor]])
In this part of the metaphor, the things they saw Jesus do provided understanding just as an eye provides light for the body. Alternate translation: "Your eye is like the lamp of the body" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Here "eye" here is a metonym for vision. Alternate translation: "When your vision is good" or "when you see well" (See: [[rc://en/ta/man/translate/figs-metonymy]])
This can be stated in active form. Alternate translation: "the light will fill your whole body" or "you will be able to see everything clearly" (See: [[rc://en/ta/man/translate/figs-activepassive]])
Here "eye" is a metonym for vision. Alternate translation: "When your vision is bad" or "when you see poorly" (See: [[rc://en/ta/man/translate/figs-metonymy]])