[The diurnal variation of the intraocular pressure of vitrectomized eyes receiving instillation of silicone oil].
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).
Dept. of Ophthalmol., Tohoku Univ. School of Med., Sendai, Japan.
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Hoshi
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Tamai
D000293:Adolescent; D000328:Adult; D000368:Aged; D002940:Circadian Rhythm; D003930:Diabetic Retinopathy / Q000503:physiopathology / Q000601:surgery; D005260:Female; D006801:Humans; D007322:Instillation, Drug; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D012827:Silicone Oils / Q000008:administration & dosage / Q000627:therapeutic use*; D014821:Vitrectomy
D012827:Silicone Oils