title: Comparision of Optical Low Coherence Reflectometry Versus Ultrasonic Biometry in High Hypermetropia.
abstract: OBJECTIVE
  To compare anterior chamber depth (ACD), axial length (AL), and lens thickness (LT) measurements obtained by the Lenstar LS 900 (Haag-Streit AG) optical low-coherence reflectometry with those obtained by the A-scan contact ultrasound among patients with moderate and high hypermetropia.
  
  
  METHODS
  Fifty-two eyes of 52 patients with moderate and high hypermetropia (spherical equivalent of +4 D or more) were examined in this study measurements of ACD, AL, and LT obtained by Lenstar were compared with those obtained by applanation A-scan ultrasound. All measurements were obtained by two independent examiners. The interdevice agreements were evaluated with Bland-Altman analyses.
  
  
  RESULTS
  The mean age of the patients was 54.78±12.77 years (range 18-74 years). The mean spherical equivalent refractive power was +5.16±1.12 D (+4.0 to +8.75). The mean values of ACD, AL, and LT with A-scan were 3.05±0.34, 21.55±0.75, and 4.33±0.49 mm, respectively, whereas these values were 2.99±0.45, 21.58±0.78, and 4.20±0.44 mm, respectively, with Lenstar. There was statistically significant difference of LT between the two methods (P=0.02). The mean differences (lower/upper limit of agreement) of the ACD, AL, and LT values for A-scan ultrasound and Lenstar were -0.06 (-0.594/0.474), 0.04 (-0.380/0.459), and -0.12 (-0.739/0.502), respectively.
  
  
  CONCLUSIONS
  Among patients with moderate and high hypermetropia, the biometric measurements of ACD, AL, and LT by ultrasound and optical biometry were determined to be correlated and there was a high degree of agreement between contact A-scan ultrasonic biometry and Lenstar.
authors.affiliation: Department of Ophthalmology (R.A., S.K.E.), Istanbul Medipol University, Istanbul, Turkey; Department of Ophthalmology (K.S.C.), Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey; Department of Ophthalmology (E.K.), Bati Göz Hospital, Izmir, Turkey; and Department of Ophthalmology (S.K.), Dokuz Eylul University, Izmir, Turkey.
authors.forename: Rukiye
authors.initials: R
authors.lastname: Aydin
authors.forename: Sevil
authors.initials: S
authors.lastname: Karaman Erdur
authors.forename: Kubra
authors.initials: K
authors.lastname: Serefoglu Cabuk
authors.forename: Eyyup
authors.initials: E
authors.lastname: Karahan
authors.forename: Suleyman
authors.initials: S
authors.lastname: Kaynak
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000867:Anterior Chamber / Q000000981:diagnostic imaging / Q000473:pathology; D058452:Axial Length, Eye / Q000000981:diagnostic imaging / Q000473:pathology; D001699:Biometry / Q000379:methods*; D003430:Cross-Sectional Studies; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D006801:Humans; D006956:Hyperopia / Q000000981:diagnostic imaging* / Q000473:pathology; D007908:Lens, Crystalline / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D008875:Middle Aged; D061848:Optical Imaging / Q000379:methods*; D055815:Young Adult