title: The influence of soft contact lenses on the intraocular pressure measurement.
abstract: OBJECTIVE
  To evaluate the influence of silicone hydrogel contact lenses on the intraocular pressure (IOP) measurement using Goldmann applanation tonometry (GAT), non-contact tonometry (NCT), and Pascal dynamic contour tonometry (DCT).
  
  
  METHODS
  We included in the study 40 eyes of 40 patients who did not have any ocular or systemic diseases or contraindications to contact lens use. We measured and recorded the IOP values of each patient using NCT without and with contact lenses (groups 1 and 2, respectively), using DCT without and with contact lenses (groups 3 and 4, respectively), and using GAT without contact lenses (group 5).
  
  
  RESULTS
  The mean IOP value of group 1 was 14.55 ± 2.95 mm Hg and 13.92 ± 2.58 mm Hg in group 2. We detected no statistically significant difference between group 1 and group 2 (P=0.053). The mean IOP values for group 3 and group 4 were 16.26 ± 2.33 mm Hg and 15.19 ± 2.40 mm Hg, respectively. We detected a statistically significant difference between groups 3 and 4 (P=0.005). Group 5's mean IOP value was 12.97 ± 2.65 mm Hg. IOP values measured with DCT were statistically significantly higher compared with IOP values measured with NCT and GAT (P<0.0001 and P<0.0001, respectively). Additionally, IOP values measured with NCT were statistically significantly higher compared with IOP values measured with GAT (P<0.0001).
  
  
  CONCLUSIONS
  According to the results of our study, silicone hydrogel soft contact lens use does not significantly affect IOP values measured with NCT, but it affects IOP values measured with DCT.
authors.affiliation: Department of Ophthalmology, Turgut Ozal Medical Center, Inonu University, Malatya, Turkey. pembegulbozgul@gmail.com.
authors.forename: Pembegül
authors.initials: P
authors.lastname: Bozgül
authors.affiliation: Department of Ophthalmology, State Hospital, Malatya, Turkey.
authors.forename: C
authors.initials: C
authors.lastname: Cankaya
authors.affiliation: Department of Ophthalmology, Turgut Ozal Medical Center, Inonu University, Malatya, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Doganay
authors.affiliation: Department of Ophthalmology, Turgut Ozal Medical Center, Inonu University, Malatya, Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Cavdar
authors.affiliation: Department of Ophthalmology, Turgut Ozal Medical Center, Inonu University, Malatya, Turkey.
authors.forename: S
authors.initials: S
authors.lastname: Duman
authors.affiliation: Department of Ophthalmology, State Hospital, Sıırt, Turkey.
authors.forename: E
authors.initials: E
authors.lastname: Ozsoy
authors.affiliation: Department of Ophthalmology, State Hospital, Kahramanmaras, Turkey.
authors.forename: B
authors.initials: B
authors.lastname: Koc
mesh_terms: D000328:Adult; D003263:Contact Lenses, Hydrophilic; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D014065:Tonometry, Ocular / Q000379:methods*
references.citation: Clin Exp Optom. 2008 Nov;91(6):524-9
references.pmid: 18651843
references.citation: Graefes Arch Clin Exp Ophthalmol. 2005 Apr;243(4):359-66
references.pmid: 15864625
references.citation: Am J Ophthalmol. 2006 Oct;142(4):583-90
references.pmid: 17011849
references.citation: Ophthalmology. 2010 Apr;117(4):730-7
references.pmid: 20122737
references.citation: Ophthalmic Physiol Opt. 2006 Jan;26(1):33-9
references.pmid: 16390480
references.citation: J Glaucoma. 2011 Mar;20(3):179-82
references.pmid: 19593202
references.citation: Cont Lens Anterior Eye. 2007 Sep;30(4):233-8; quiz, 260-1
references.pmid: 17693127
references.citation: Nippon Ganka Gakkai Zasshi. 1991 Sep;95(9):869-72
references.pmid: 1796769
references.citation: Optom Vis Sci. 2008 Jun;85(6):451-6
references.pmid: 18521023
references.citation: Cont Lens Anterior Eye. 2004 Mar;27(1):33-7
references.pmid: 16303525
references.citation: Eye (Lond). 2010 Jul;24(7):1165-70
references.pmid: 20150923
references.citation: Cont Lens Anterior Eye. 2010 Oct;33(5):219-24
references.pmid: 20471302
references.citation: Acta Ophthalmol. 2011 Nov;89(7):676-80
references.pmid: 19900196
references.citation: Cont Lens Anterior Eye. 2010 Oct;33(5):239-44
references.pmid: 20638323
references.citation: Br J Ophthalmol. 2005 Jul;89(7):851-4
references.pmid: 15965165
references.citation: Am J Ophthalmol. 1990 Jan 15;109(1):62-5
references.pmid: 2297033
references.citation: Eye (Lond). 2009 Jul;23(7):1582-8
references.pmid: 19407845
references.citation: Arch Ophthalmol. 1991 Jun;109(6):825-8
references.pmid: 2043070
references.citation: CLAO J. 1997 Apr;23(2):130-3
references.pmid: 9108980
references.citation: Optometry. 2010 Dec;81(12):671-9
references.pmid: 21111376
references.citation: Graefes Arch Clin Exp Ophthalmol. 2005 Aug;243(8):763-7
references.pmid: 15756572
references.citation: Optom Vis Sci. 2004 Aug;81(8):601-5
references.pmid: 15300119
references.citation: Graefes Arch Clin Exp Ophthalmol. 2009 Mar;247(3):371-5
references.pmid: 18843499
references.citation: Eye (Lond). 2006 Feb;20(2):191-8
references.pmid: 15803173