on the basis of the present results it appears rational to recommend hyperventilation to keep the paco2 between 25 and 30 mm and a 15 degree anti-trendelenburg position in operations on the eye under general anaesthesia , since both procedures afford a low central venous pressure and consequently a low pressure in the posterior segment of the eye , with its attendant advantages as regards vitreous complications and the insertion of intraocular lenses .
C0015392
eye
C0578853
the posterior segment of