An aqueous composition for application in a method for surgical or therapeutic treatment of the human or animal body or in a diagnostic procedure which is practiced on the human or animal body, the composition comprising osmotically active particles and containing less than 70 μl−1 of amniotic cells, the osmolarity of the composition being in the range from 240.0 mosm/l to less than 308.0 mosm/l, and the chloride ion concentration in the composition being not more than 130.0 mmol/l. An aqueous composition for application with an amniotic infusion, the composition containing less than 70 μl−1 of amniotic cells and comprising at least one surfactant, is also disclosed.