Seidel studied the formation of
aqueous humor in the
ciliary body and the flow of aqueous humor through the
Schlemm's canal, and attempted to explain the movement of aqueous humor experimentally. In the same year he also described a glaucomatous
Visual field defect which is now known as
Seidel sign or Seidel's scotoma. In this scotoma the
blind spot of the eye enlarges vertically into a sickle cell shape. In 1921 he described a test to assess the presence of
aqueous humor leakage from the
anterior chamber of the eye, which is known as
Seidel test now. ==Selected publications==