title: Effect of body posture on intraocular pressure and ocular perfusion pressure in nonglaucomatous pregnant women.
abstract: OBJECTIVE
  To investigate the effect of different positions on the intraocular pressure (IOP) and ocular perfusion pressure (OPP) in nonglaucomatous pregnant.
  
  
  METHODS
  Thirty-one women in their third trimester of pregnancy were enrolled in this prospective and observational study. IOP in both eyes was measured with a Tono-pen® in the sitting position (Si-P), in the supine position (Su-P), in the right lateral decubitus position (R-LDP), and left lateral decubitus position (L-LDP). Systolic and diastolic blood pressure (sBP and dBP) were measured with a digital automatic blood pressure monitor at after 10 min in each position. Mean blood pressure ([mBP] = dBP + 1/3 [sBP-dBP]) and mean OPP (OPP = 2/3 mBP-IOP) were also calculated. Three IOP measurements were performed by the same clinician at the 15th min in each position.
  
  
  RESULTS
  The mean IOP was 13.6 ± 3.4 mmHg in Si-P; 16.7 ± 3.5 mmHg in Su-P; 16.4 ± 3.5 mmHg in the R-LDP, and 16.6 ± 3.7 mmHg in the L-LDP. IOP was significantly lower in Si-P compared to Su-P, R-LDP, or L-LDP. The mean OPP was 46.41 ± 5.54 in Si-P; 39.71 ± 6.96 in Su-P; 36.81 ± 6.57 in the R-LDP; and 33.53 ± 7.63 in the L-LDP. OPP values were significantly different between each body position when multiple comparisons were performed.
  
  
  CONCLUSIONS
  According to our data we conclude that Si-P yields the lowest IOP and the highest OPP compared with Su-P, R-LDP, and L-LDP in healthy pregnant women.
authors.affiliation: Department of Ophthalmology, Kanuni Sultan Suleyman Education and Research Hospital, Istanbul, Turkey. dr.necipkara@gmail.com
authors.forename: Necip
authors.initials: N
authors.lastname: Kara
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Yildirim
authors.forename: Ali Ismet
authors.initials: AI
authors.lastname: Tekirdag
authors.forename: Gonca Yetkin
authors.initials: GY
authors.lastname: Yildirim
authors.forename: Vuslat Lale
authors.initials: VL
authors.lastname: Bakir
authors.forename: Bekir
authors.initials: B
authors.lastname: Gulac
authors.forename: Gokce
authors.initials: G
authors.lastname: Yilmaz
authors.forename: Aysun
authors.initials: A
authors.lastname: Fendal
mesh_terms: D000328:Adult; D005260:Female; D005865:Gestational Age; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D011446:Prospective Studies; D012016:Reference Values; D014065:Tonometry, Ocular; D055815:Young Adult