title: Clinical evaluation of the accuracy of intraocular pressure measurement by Tono-Pen XL in eyes with amniotic membrane patching.
abstract: OBJECTIVE
  To evaluate the influence of amniotic membrane on intraocular pressure (IOP) measurement with the Tono-Pen.
  
  
  METHODS
  Observational case series.
  
  
  METHODS
  Eight patients with partial limbal dysfunction who underwent penetrating keratoplasty were recruited. Amniotic membranes were patched just after keratoplasty. One week postoperatively, amniotic membranes were removed, and accuracy of IOP measurement with the Tono-Pen was evaluated with comparisons before and after the removal.
  
  
  RESULTS
  No epithelial defects were detected after the removal of amniotic membrane. Mean IOPs with and without amniotic membranes were 16.6 +/- 3.0 mm Hg (mean +/- SD) and 16.0 +/- 3.7 mm Hg, respectively. The difference was not statistically significant.
  
  
  CONCLUSIONS
  Assessment of IOP with the Tono-Pen was observed to be accurate even when used over an amniotic membranes patch in cases who underwent penetrating keratoplasty.
authors.affiliation: Department of Ophthalmology, Tokyo Dental College, Ichikawa, Chiba 272-8513, Japan. ongucii@yahoo.co.jp
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Onguchi
authors.forename: Yoji
authors.initials: Y
authors.lastname: Takano
authors.forename: Murat
authors.initials: M
authors.lastname: Dogru
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tsubota
authors.forename: Jun
authors.initials: J
authors.lastname: Shimazaki
mesh_terms: D000328:Adult; D000368:Aged; D000650:Amnion / Q000637:transplantation*; D003316:Corneal Diseases / Q000601:surgery*; D019573:Epithelium, Corneal / Q000166:cytology; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D015948:Keratoplasty, Penetrating; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D014065:Tonometry, Ocular / Q000379:methods*