 Two of his assistants at Breslau were Hermann Wilbrand (1851–1935) and Hermann Rudolph Aubert (1826–1892).Förster is remembered for conducting tests of visual acuity, and for his investigations of indirect vision (peripheral vision) and visual performance across the visual field together with Hermann Aubert.The linear variation of visual performance that they described is sometimes referred to as the Aubert-Foerster law.