title: Clinical comparison of a new swept-source optical coherence tomography-based optical biometer and a time-domain optical coherence tomography-based optical biometer.
abstract: OBJECTIVE
  To evaluate the repeatability and reproducibility of a newer swept-source optical biometer and to compare it with a standard partial coherence interferometry (PCI) biometer.
  
  
  METHODS
  Siriraj Hospital, Mahidol University, Bangkok, Thailand.
  
  
  METHODS
  Prospective comparative study.
  
  
  METHODS
  One hundred eyes from 100 cataract patients were enrolled in this study. Each patient was measured with 2 optical biometers, a newer swept-source optical biometer (IOLMaster 700) and a standard partial coherence interferometry biometer (IOLMaster 500) by 2 independent operators. The keratometry, axial length (AL), anterior chamber depth, white-to-white corneal diameter, and intraocular lens (IOL) power, calculated by the SRK/T and the Haigis formulas for each device, were recorded. Intraoperator repeatability and interoperator reproducibility of both devices were analyzed using intraclass correlation coefficients (ICCs). Agreement of ocular biometry and IOL power between the 2 devices was evaluated using the Bland-Altman method.
  
  
  RESULTS
  The repeatability and reproducibility of the swept-source and standard biometers were high for all ocular biometry parameters (ICC, 0.93-1.00). The agreement between the 2 biometers was also high (ICC, 0.92-1.00). The IOL powers obtained from both devices were not distinct. Because of the density of the cataracts, the AL in 5 eyes could be measured only by the swept-source biometer.
  
  
  CONCLUSIONS
  Repeatability and reproducibility of a swept-source optical biometer was excellent and agreement with a standard biometer was very high. Better lens penetration ability and AL measurements were obtained with the swept-source biometer than with the standard biometer.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors.forename: Sabong
authors.initials: S
authors.lastname: Srivannaboon
authors.affiliation: From the Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand. Electronic address: chareenun@gmail.com.
authors.forename: Chareenun
authors.initials: C
authors.lastname: Chirapapaisan
authors.affiliation: From the Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors.forename: Pratuangsri
authors.initials: P
authors.lastname: Chonpimai
authors.affiliation: From the Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors.forename: Siriwan
authors.initials: S
authors.lastname: Loket
mesh_terms: D000368:Aged; D000867:Anterior Chamber / Q000473:pathology; D058452:Axial Length, Eye / Q000473:pathology; D001699:Biometry / Q000379:methods*; D002386:Cataract / Q000150:complications* / Q000473:pathology; D003315:Cornea / Q000473:pathology; D005260:Female; D006801:Humans; D007368:Interferometry; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D015588:Observer Variation; D055095:Optics and Photonics; D011446:Prospective Studies; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D041623:Tomography, Optical Coherence / Q000295:instrumentation*