In his place; in the court of the tabernacle. He could not see, to wit, clearly and distinctly. This is added as an evidence of his old age, partly to show God's contempt of him, notwithstanding his venerable age, and his preferring the child Samuel before him in this vision; and partly as the reason why Samuel so readily ran to him upon the first call, because his great age made him more to need his servants help.
Related Commentaries of 1 Samuel 3:2
1 Samuel 3:2
2 And it came to pass at that time, when Eli was laid down in his place, and his eyes began to wax dim, that he could not see;