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Evolution of central corneal thickness in children with congenital glaucoma requiring glaucoma surgery
Isabel Oberacher-Velten1, Christopher Prasser, Birgit Lorenz
1Department of Paediatric Ophthalmology, Strabismology, and Ophthalmogenetics, University of Regensburg, Franz Josef Strauss Allee 11, 93053 Regensburg, Germany. Isabel.velten@klinik.uni-regensburg.de
Insights
Congenital glaucoma surgery in infants significantly reduced intraocular pressure (IOP) and central corneal thickness (CCT). Corneal ultrasound pachymetry is valuable for monitoring these changes post-surgery.
Area of Science:
- Ophthalmology
- Pediatric Surgery
- Medical Imaging
Background:
- Congenital glaucoma is a rare condition affecting infants.
- Intraocular pressure (IOP) and central corneal thickness (CCT) are key metrics in glaucoma management.
- Understanding the relationship between CCT and IOP is crucial for effective treatment.
Purpose of the Study:
- To investigate the changes in central corneal thickness (CCT) after glaucoma surgery in children.
- To correlate these CCT changes with intraocular pressure (IOP) measurements.
- To evaluate the effectiveness of corneal ultrasound pachymetry in monitoring pediatric glaucoma patients.
Main Methods:
- Trabeculotomy was performed on nine eyes of five infants with congenital glaucoma.
- Corneal ultrasound pachymetry and tonometry were used to measure CCT and IOP.
- Measurements were taken before and for at least 12 months after surgery, with sedation used when necessary.
Main Results:
- Mean CCT decreased from 651 microm to 592 microm within two weeks post-surgery, with further regression observed.
- Mean IOP decreased from 18.6 mmHg to 14.8 mmHg after surgery.
- A significant correlation was found between the decrease in CCT and the decrease in IOP.
Conclusions:
- Glaucoma surgery leads to a significant reduction in both CCT and IOP in children.
- Corneal ultrasound pachymetry is a valuable tool for monitoring CCT changes in infants and children post-glaucoma surgery.
- The study highlights the importance of regular follow-up using pachymetry for pediatric glaucoma management.
Background:
The purpose of the study was to investigate the evolution of central corneal thickness (CCT) in correlation to the intraocular pressure (IOP) in children with congenital glaucoma before and after glaucoma surgery.
Methods:
Nine eyes of five children (age 2 weeks to 6 months, mean 23 weeks) underwent trabeculotomy for congenital glaucoma. Corneal ultrasound pachymetry (PacScan 3000 AP, Technomed, Germany), tonometry using the Perkins tonometer, and slit-lamp examination (additionally to a clinical routine examination with retinoscopy, funduscopy, measurement of axial length and corneal diameter) were performed before and for at least 12 months after glaucoma surgery. In all children, corneal pachymetry and slit-lamp biomicroscopy--and whenever possible applanation tonometry--were performed without sedation or general anesthesia. If measurement of the IOP was not possible otherwise (in four of the five children), sedation with midazolam orally was used to measure the IOP at 2 weeks, 6 weeks, and 3 months after trabeculotomy, then every 3 months.
Results:
Six of nine eyes had biomicroscopically clear corneas without visible corneal edema before trabeculotomy. In three eyes, a corneal edema was visible in at least one quadrant of the cornea. Regarding all eyes together, mean CCT was 651 +/- 138 microm before trabeculotomy; this decreased to 592 +/- 119 microm within 2 weeks after trabeculotomy. At 6 weeks and 3 months there was a further regression to 569.4 +/- 16 microm. Mean IOP was 18.6 +/- 7.5 mmHg before and decreased to 14.8 +/- 5.8 mmHg after glaucoma surgery. Regarding IOP data obtained under general anaesthesia, decrease of CCT was significantly correlated with decrease in IOP. There was no significant difference in the correlation between eyes with and without visible corneal edema.
Conclusions:
Corneal ultrasound pachymetry appears to be a valuable additional measure in the follow-up of infants and small children requiring glaucoma surgery.
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