Contents

Search

intraocular pressure (IOP)

Clinical significance: - normal intraocular pressure (IOP) is 10-21 mm Hg, resulting from the difference between production of & the resistance to drainage of aqueous humor - there is a diurnal variation in IOP, from 3 - 6 mm Hg - variation may increase in patients with glaucoma - during the night, intraocular pressure may not decrease despite slower production of aqueous humour [3] - elevated intraocular pressure occurs from midnight until 10 AM in patients with open angle glaucoma [6] - maximal intraocular pressure is at 4 AM - intraocular pressure is measured by tonometry - exercise may influence intraocular pressure - aerobic exercise may decrease intraocular pressure - weight-lifting may increase intraocular pressure

Related

aqueous humor increased intraocular pressure (IOP) tonometry

General

pressure

References

  1. Saunders Manual of Medical Practice, Rakel (ed), WB Saunders, Philadelphia, 1996, pg 66
  2. Medical Knowledge Self Assessment Program (MKSAP) 11, 16. American College of Physicians, Philadelphia 1998, 2012
  3. Wikipedia: Intraocular pressure http://en.wikipedia.org/wiki/Intraocular_pressure
  4. Viera GM et al Intraocular Pressure Variation During Weight Lifting Arch Ophthalmol. 2006, 124 (9): 125154. PMID: 16966619
  5. Murgatroyd H et al Intraocular pressure Contin Educ Anaesth Crit Care Pain (2008) 8 (3): 100-103 http://ceaccp.oxfordjournals.org/content/8/3/100.full
  6. Mansouri K, Shaarawy T. Continuous intraocular pressure monitoring with a wireless ocular telemetry sensor: initial clinical experience in patients with open angle glaucoma. Br J Ophthalmol. 2011 May;95(5):627-9. PMID: 21216796