'Eye' in the Bible

All things are full of toil; none can express it. The eye is not satisfied with seeing, nor the ear filled with hearing.

There is one alone and without a second; also he hath neither son nor brother: yet is there no end of all his labour, neither is his eye satisfied with riches, and he saith not, For whom then am I labouring, and depriving my soul of good? This also is vanity and a grievous occupation.