The present invention relates to the use of antisecretory factors, such as antisecretory proteins, homologues, derivatives and/or fragments thereof having antisecretory activity, for the manufacture of a pharmaceutical composition for use in the treatment and/or prevention of intraocular hypertension. The invention thus relates to the use of pharmaceutical compositions comprising antisecretory factors in the treatment and/or prevention of intraocular hypertension, which is preferably characterized by hampered outflow of body fluid resulting in elevated pressure in the eye. The invention provides for a novel approach for treating and/or preventing such a condition turning the intraocular pressure to an acceptable level, optionally 21 mm Hg, or less.