title: Factors Affecting Corneal Hysteresis in Taiwanese Adults.
abstract: OBJECTIVE
  To investigate the correlation of various corneal hysteresis (CH) factors in Chinese adults.
  
  
  METHODS
  From January 2009 to November 2011, the healthy right eyes of a total of 292 adults were recruited into the study. Goldmann-correlated intraocular pressure (IOPG) and CH were measured using an ocular response analyzer (ORA). Central corneal thickness was measured using the ORA's integrated handheld ultrasonic pachymeter. The IOLMaster was used to obtain the ocular biometric measurements including axial length, anterior chamber depth, and keratometric values. The Pearson correlation coefficient was used to test correlations between CH and quantitative factors. The chi-square test was used to detect differences in categorical values.
  
  
  RESULTS
  Longer axial length (P = 0.0001), lower IOPG (P = 0.03), older age (P = 0.003), and thinner central corneal thickness (P = 0.0001) were significantly associated with lower CH. The anterior chamber depth (P = 0.34), gender (P = 0.23), and corneal curvature (P = 0.18) had no relationship to CH.
  
  
  CONCLUSIONS
  Various factors including axial length, intraocular pressure, age, and central corneal thickness can affect measurement of corneal biomechanical properties in Chinese adults. But the anterior chamber depth, gender, and corneal curvature were irrelevant to CH.
authors.forename: Jia-Kang
authors.initials: JK
authors.lastname: Wang
authors.forename: Tzu-Lun
authors.initials: TL
authors.lastname: Huang
authors.lastname: Pei-Yuan Su
authors.forename: Pei-Yao
authors.initials: PY
authors.lastname: Chang
mesh_terms: D000328:Adult; D044466:Asian People; D001696:Biomechanical Phenomena / Q000502:physiology; D001699:Biometry; D016009:Chi-Square Distribution; D003315:Cornea / Q000033:anatomy & histology / Q000502:physiology*; D019781:Corneal Topography; D006801:Humans; D007429:Intraocular Pressure; D013624:Taiwan; D014065:Tonometry, Ocular