Otto Heinrich Enoch Becker (3 May 1828 – 7 February 1890) was a German ophthalmologist born near Ratzeburgin the Duchy of Holstein.

His many publications include treatises on the vessels of the macula lutea, congenital total color blindness, strictures of the lacrimal canaliculi and manifestations involving the movement of blood in the retina.

He also completed Arlt's autobiography, "Meine Erlebnisse", following the death of his former teacher, and in 1866, published a German edition of Franciscus Cornelis Donders' work "On the Anomalies of Accommodation and Refraction of the Eye" (London, 1864) as "Die Anomalien der Accommodation und Refraktion des Auges".

[2] José Rizal (1861-1896), martyr and national hero of the Philippines, completed his ophthalmological studies under Professor Becker at the University Eye Clinic Heidelberg in 1886.

In 1879 he introduced the concept "cataracta complicata" to describe lenticular changes that often appear in various ocular diseases — these are generally characterized by punctate, striate or diffuse opacities often accompanied with a polychromatic luster.