Answer:
Convex or converging lens.
Because they help to magnify the image or increase the size of the image you are viewing when light is reflected on it or to make the quality of the image clearer to view.
Explanation:
They both make use of Convex or converging lens.
Both lenses are very important because they help to magnify the image or increase the size of the image you are viewing when light is reflected on it or to make the quality of the image clearer to view.