The Influence of Hormonal Changes During Pregnancy on Corneal Biomechanics in Humans
The intraocular pressure in the human bulbus requires that the "wall" of the eye shows a certain (bio)mechanical strength. The human cornea represents the anterior portion of this wall. Since several years, there is a growing interest in the ophthalmological community for identifying factors modulating the biomechanical stability of the human cornea. Reasons are twofold: advances in keratoconus research and the increasing numbers of refractive laser surgery procedures with (correspondingly) increasing numbers of complications due to non-respecting the limits of corneal biomechanics.
There is evidence that oestrogen, but also thyroïd hormone changes have a major impact on corneal biomechanics. A number of recent observational studies have reported on keratoconus and refractive laser surgery patients with decompensating biomechanics during pregnancy.
Both hormones also show physiological changes during pregnancy and little is known about the impact of these physiological changes on the human cornea.
The aim of this study is to establish baseline values for physiological changes in the human cornea during pregnancy.
|Pregnancy||Device: Ocular Response Analyzer Device: Scheimpflug measurement Other: Blood sample|
|Study Design:||Observational Model: Cohort
Time Perspective: Prospective
|Official Title:||Influence of Pregnancy-related Hormonal Fluctuations on Corneal Biomechanics in Humans|
- Correlate oestradiol and TSH plasma changes with changes in corneal CRF and CH and topographical changes [ Time Frame: 15 months ]3 examinations during pregnancy (gestation week 10-14, 20-26, and 36-40) and one visit at 6 months after pregnancy
|Study Start Date:||June 2012|
|Study Completion Date:||June 2014|
|Primary Completion Date:||June 2014 (Final data collection date for primary outcome measure)|
Device: Ocular Response Analyzer
Please refer to this study by its ClinicalTrials.gov identifier: NCT01629264
|University Hospital Geneva|
|Geneva, GE, Switzerland, 1211|
|Principal Investigator:||Farhad Hafezi, MDPhD||University Hospital, Geneva|