Which of the given statements are correct regarding the discovery of the cell?

The discovery of the cell is attributed to the English scientist Robert Hooke, who observed a slice of cork under a simple microscope in 1665. Hooke found that the cork had a porous structure consisting of many small, box-like structures that he called "cells." This observation marked the first time that anyone had seen these fundamental units of life. 

Robert Hooke discovered cells by using his self-made microscope, and a simple light microscope was used for observing the cells.