title: Intraocular Pressure Evaluation after Myopic Refractive Surgery: A Comparison of Methods in 121 Eyes.
abstract: OBJECTIVE
  To compare nine different formulas, developed to overcome the underestimation of intraocular pressure (IOP) readings after myopic photorefractive keratectomy (PRK).
  
  
  METHODS
  The correlations between the modified IOP and the preoperative ones in 121 eyes of 72 patients who underwent myopic PRK were evaluated.
  
  
  RESULTS
  The correlation and percentage of eyes in the range of ±2 mmHg were: Emara (R(2) = 0.1686, 74%), Munger (R(2) = 0.1665, 71%), Rosa (R(2) = 0.2489, 82%), Rashad (R(2) = 0.8593, 47%), Duch (R(2) = 0.1631, 82%), Arimoto (R(2) = 0.1638, 77%), Chihara (R(2) = 0.5389, 80%), Svedberg (R(2) = 0.1269, 54%), Kohlhaas (R(2) = 0.1074, 77%). In the case of known preoperative IOP, combining Rashad and Chihara's formulas (R(2) = 0.7730, 97%) were obtained. In the case of unknown preoperative IOP, combining Rosa and Duch's formulas (R(2) = 0.2484, 84%) were obtained.
  
  
  CONCLUSIONS
  Our results suggest calculating IOP with the average of Rashad and Chihara's formulas if the preoperative IOP is known and the average of Rosa and Duch's formulas if it is unknown.
authors.affiliation: a Department of Medicine and Surgery , University of Salerno , Salerno , Italy , and.
authors.forename: Maddalena
authors.initials: M
authors.lastname: De Bernardo
authors.affiliation: b U.O.C. Prelievo e Trapianto Cornee, Pellegrini Hospital , Naples , Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Capasso
authors.affiliation: a Department of Medicine and Surgery , University of Salerno , Salerno , Italy , and.
authors.forename: Luisa
authors.initials: L
authors.lastname: Caliendo
authors.affiliation: a Department of Medicine and Surgery , University of Salerno , Salerno , Italy , and.
authors.forename: Ylenia
authors.initials: Y
authors.lastname: Vosa
authors.affiliation: a Department of Medicine and Surgery , University of Salerno , Salerno , Italy , and.
authors.forename: Nicola
authors.initials: N
authors.lastname: Rosa
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000503:physiopathology / Q000601:surgery; D003315:Cornea / Q000473:pathology; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D054018:Lasers, Excimer / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*; D018903:Photorefractive Keratectomy / Q000379:methods*; D014065:Tonometry, Ocular; D055815:Young Adult
keywords: Corneal thickness; Goldmann applanation tonometry; glaucoma; myopia; photorefractive keratectomy