title: [Clinical application of the 24 hour IOP monitoring in the diagnose of the normal tension glaucoma suspects].
abstract: OBJECTIVE
  To determine the value of 24-hour IOP monitoring in routine clinical practice of the suspects of normal tension glaucoma (NTG).
  
  
  METHODS
  Fifty-one suspects of NTG (51 eyes) were selected for 24-hour IOP monitoring without any antiglaucoma therapy.
  
  
  RESULTS
  In all of 51 eyes, there were only 18 (35.3%) eyes's IOP kept in the statistic normal range and the IOP variation amplitude were under 6 mm Hg, 33 eyes (64.7%) have large diurnal fluctuations in IOP or the peak IOP up to 21 mm Hg. The mean of the IOP variation amplitude ,mean and peak of the 24-hour monitoring was 4.65 mm Hg, 1.64 mm Hg and 3.96 mm Hg higher than of the daytime IOP measurement (P < 0.001).
  
  
  CONCLUSIONS
  Compared with the daytime IOP measurement, the 24-hour IOP monitoring could identify diurnal IOP and/or IOP spikes better.
authors.affiliation: Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China.
authors.forename: Chi
authors.initials: C
authors.lastname: Du
authors.forename: Shouxiong
authors.initials: S
authors.lastname: Peng
authors.forename: Wenmin
authors.initials: W
authors.lastname: Huang
mesh_terms: D000328:Adult; D000368:Aged; D002940:Circadian Rhythm; D005260:Female; D005901:Glaucoma / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic; D014065:Tonometry, Ocular