title: Age-related changes of ocular parameters in Korean subjects.
abstract: OBJECTIVE
  To evaluate the age-related variations of ocular parameters in Korean subjects.
  
  
  METHODS
  We recruited 314 normal subjects who visited the department of Ophthalmology between January 2007 and October 2007. Refraction, axial length, corneal curvature, white-to-white distance, anterior chamber depth, corneal endothelial cell density, and retinal nerve fiber layer (RNFL) thickness were measured using auto-refractive keratometer, intraocular lens master, noncontact specular microscope, and optical coherence tomography.
  
  
  RESULTS
  In correlation analysis, from 19 to 82 years, hyperopic shift showed a strong positive statistical correlation with age (r = 0.553, P < 0.001). Corneal curvatures increased (r = 0.221, P < 0.001), while axial length (r = -0.506, P < 0.001), anterior chamber depth (r = -0.491, P < 0.001) and white-to-white distance (r = -0.205, P < 0.001) decreased with age. Also, corneal endothelial cell density was lower in older patients than in younger patients (r = -0.409, P < 0.001). Compared to younger patients, RNFL thickness was lower in the older patients as well, in all quadrants (superior, r = -0.283, P < 0.001; inferior, r = -0.230, P < 0.001; nasal, r = 0.025, P = 0.676; and temporal, r = -0.393, P < 0.001). According to multiple regression analysis, out of the six parameters measured, only hyperopic shift, anterior chamber depth and corneal endothelial cell density (P < 0.05) had statistically significant correlation with age.
  
  
  CONCLUSIONS
  Some of the ocular parameters changed with aging. Hyperopic shift, shallowing anterior chamber depth, and reduction of corneal endothelial cell density were only definitely related to age.
authors.affiliation: Department of Ophthalmology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Korea.
authors.forename: Dae Woong
authors.initials: DW
authors.lastname: Lee
authors.forename: Joon Mo
authors.initials: JM
authors.lastname: Kim
authors.forename: Chul Young
authors.initials: CY
authors.lastname: Choi
authors.forename: Donghun
authors.initials: D
authors.lastname: Shin
authors.forename: Ki Ho
authors.initials: KH
authors.lastname: Park
authors.forename: Jung Gon
authors.initials: JG
authors.lastname: Cho