The diurnal variation of the intraocular pressure of vitrectomized eyes receiving instillation of silicone oil
Hoshi, S.; Tamai, M.
Nippon Ganka Gakkai Zasshi 94(3): 281-285
1990
ISSN/ISBN: 0029-0203 PMID: 2396579 Document Number: 349408
We examined diurnal variations of intraocular pressure (IOP) before and after scleral encircling, vitrectomy and silicone oil (S.O) tamponade in 7 patients (7 eyes) with proliferative diabetic retinopathy (PDR), and 8 patients (8 eyes) with proliferative vitreoretinopathy (PVR). They were all successfully operated and the IOP was lower than 24 mm Hg without medication. The contralateral, non-operated eye was used as the control. IOP was measured every 4 hours with Goldmann applanation tonometer or a pneumotonometer (Alcon) by the single examinee (S.H.). The amplitudes of the diurnal variation of the IOP with S.O. tamponade were smaller than those of the control eyes (p less than 0.05). Phakic eyes with silicon oil tamponade showed smaller amplitudes of IOP diurnal variation than those in aphakic eyes (p less than 0.05). The physiological significance is not clear yet, but these results suggest that the S.O. tamponade have some effect on the dynamics of the intraocular fluid in operated eyes (p less than 0.05).