title: Ocular biometric characteristics during the menstrual cycle.
abstract: OBJECTIVE
  To determine the ocular biometric characteristics during the menstrual cycle using the optical low-coherence reflectometry (OLCR) biometry.
  
  
  METHODS
  Twenty-two healthy women between the ages of 19 and 36 years with regular menstrual cycles were enrolled in this prospective study. Subjects with irregular menstrual cycles, those taking contraceptive pills, those with a history of ocular surgery or trauma, and women unable to cooperate with the ocular biometry device were excluded from this study. A complete ophthalmic examination was performed between 8.30 and 10.30 am for all participants. Also, central corneal thickness, axial length, anterior chamber depth, lens thickness, and keratometric measurements were made at the same time using the OLCR device. Measurements were taken at the beginning of the cycle (1-3 days), at ovulation (12-16 days), and at the end of the cycle (26-32 days).
  
  
  RESULTS
  The mean age of the participants was 22.86±4.22 (range: 18-36) years. The difference in central corneal thickness, axial length, anterior chamber depth, lens thickness, and keratometry values were not statistically significant during the menstrual cycle.
  
  
  CONCLUSIONS
  The ocular biometric parameters did not significantly vary during the menstrual cycle according to the OLCR biometry.
authors.affiliation: Department of Ophthalmology, Adnan Menderes University Medical Faculty, Aydın, Turkey.
authors.forename: Harun
authors.initials: H
authors.lastname: Çakmak
authors.affiliation: Department of Midwifery, School of Health, Adnan Menderes University Medical Faculty, Aydın, Turkey.
authors.forename: Ayten
authors.initials: A
authors.lastname: Taspinar
authors.affiliation: Department of Ophthalmology, Adnan Menderes University Medical Faculty, Aydın, Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Ozbagcivan
authors.affiliation: Department of Ophthalmology, Adnan Menderes University Medical Faculty, Aydın, Turkey.
authors.forename: Tolga
authors.initials: T
authors.lastname: Kocatürk
keywords: OLCR; menstrual cycle; ocular biometry