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Evaluation of Corneal Deformation Parameters Provided by the Corvis ST Tonometer After Trabeculectomy
Evaluation of Corneal Deformation Parameters Provided by the Corvis ST Tonometer After Trabeculectomy
- Source :
- Journal of Glaucoma. 26:166-172
- Publication Year :
- 2017
- Publisher :
- Ovid Technologies (Wolters Kluwer Health), 2017.
-
Abstract
- Purpose The aims of this study were to evaluate how the corneal deformation parameters provided by the Corvis ST tonometer (CST) were influenced by pressure-lowering ocular surgery, and to determine the correlations of intraocular pressure (IOP) and axial length (AL) with CST corneal deformation parameters. Methods This prospective 1-month study enrolled 22 subjects (22 eyes) who underwent trabeculectomy combined with mitomycin C. The corneal deformation parameters were measured using the CST. IOP was measured before and after surgery by a Goldmann applanation tonometer and the CST. The central corneal thickness and AL were also recorded. The correlations of the corneal deformation parameters with central corneal thickness, AL, and IOP changes were determined by linear regression analysis. Results IOP decreased significantly after surgery. AL was significantly shorter at 1 week after surgery. There were significant changes in the CST parameters time 1, velocity 1, velocity 2, peak distance highest concavity, and deformation amplitude highest concavity at 1 week and 1 month after surgery and in time highest concavity at 1 week after surgery. The change in time 1 was significantly correlated with preoperative IOP and the IOP reductions, and was positively correlated with the decrease in AL at 1 week. The increase in velocity 1 was negatively correlated with preoperative IOP, and IOP reductions. The change in time highest concavity was negatively correlated with IOP before surgery and the decrease in IOP at 1 week. Conclusion CST is a good choice for measuring IOP, especially when aiming for normalization of IOP after glaucoma surgery.
- Subjects :
- Adult
Male
Intraocular pressure
medicine.medical_specialty
genetic structures
Ocular surgery
medicine.medical_treatment
Glaucoma
Trabeculectomy
Cornea
Tonometry, Ocular
03 medical and health sciences
0302 clinical medicine
Ophthalmology
medicine
Glaucoma surgery
Humans
Corneal deformation
Prospective Studies
Prospective cohort study
Intraocular Pressure
Aged
business.industry
Axial length
Middle Aged
medicine.disease
Elasticity
eye diseases
Axial Length, Eye
030221 ophthalmology & optometry
Female
sense organs
Glaucoma, Angle-Closure
business
Glaucoma, Open-Angle
030217 neurology & neurosurgery
Subjects
Details
- ISSN :
- 10570829
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Journal of Glaucoma
- Accession number :
- edsair.doi.dedup.....bb81b0ad6c69375086beb17924ef8d0c
- Full Text :
- https://doi.org/10.1097/ijg.0000000000000590