title: Normative Ocular Biometric Dimensions and its Variation in a Nigerian Population.
abstract: BACKGROUND
  The increasing need for high precision in different aspects of clinical and diagnostic ophthalmology calls for a knowledge of the normative ocular biometric parameters. Since this may be affected by race, it is thus important to obtain more information in an effort to determine the African values.The main objective of this study is to determine the normal ocular biometric dimensions and their variation with age in a south western Nigerian population.
  
  
  METHODS
  A population-based descriptive cross-sectional study carried out in Sagamu Local Area of Ogun State, Nigeria.
  
  
  METHODS
  A multi-staged cluster random sampling technique was used to select eligible participants who underwent ocular biometry between July and October 2010.
  
  
  RESULTS
  Three hundred and two respondents aged 18 years and above underwent A-scanography and keratometry. The mean axial length, anterior chamber depth, lens thickness, vitreous chamber depth and cornea power were 23.31±0.91mm, 3.13±0.40mm, 4.15±0.46mm, 16.01±0.91mm and 43.77±1.33D respectively. Axial length, lens thickness and vitreous chamber depth demonstrated a significant positive increase with age while anterior chamber depth and cornea power decreased with age.
  
  
  CONCLUSIONS
  Ocular biometric values in adults of South Western Nigeria were comparable to previous documentations and had significant variation with age.
authors.affiliation: Ophthalmology Unit, Department of Surgery, Ben Carson School of Medicine, Babcock University, Ilishan-Remo, Ogun State, Nigeria.
authors.forename: O A
authors.initials: OA
authors.lastname: Jagun
authors.forename: O O
authors.initials: OO
authors.lastname: Onabolu
authors.forename: H A
authors.initials: HA
authors.lastname: Ajibode