Acute bilateral corneal hydrops caused by high temperature and high moisture in the Finnish sauna. A clinical and histological case report of a patient with keratoconus.

A 44-year-old healthy male with bilateral keratoconus developed acute hydrops of both his corneas with an interval of 3 years. On both occasions he had bathed in a hot, humid Finnish sauna the preceding evening. Penetrating keratoplasty had to be performed in the acute stage in both instances, as medical therapy brought no improvement. The contributory role of hot, moist air to the development of acute hydrops is discussed. Histopathological examination of the corneal buttons revealed clear-cut breaks in Descemet's membrane with marked posterior stromal oedema.