The authors undertook this study to report the corneal tomographic characteristics of eyes that had surgery for controlled primary congenital glaucoma (PCG) compared to a control group. The study included 44 eyes of 27 children (18 males) having surgery for PCG, and 60 eyes of 32 age-matched control children (nine males). Surgery included combined trabeculectomy-trabeculotomy with antimetabolite. IOPs of eyes with PCG were normal indicating controlled disease. PCG children were myopic – mean -4.70 ±3.50D and cylinder value of -2.80 ±2.10D. Five corneas showed Haab’s stria. Compared to controls, PCG eyes had significantly flatter corneas, higher astigmatism, thinner corneas and larger anterior chambers. There was a significant negative correlation between postoperative axial length and each of parameters of flat keratometry, steep keratometry, pachymetry at pupil centre and at thinnest location, anterior chamber volume, depth and angle. There was a statistically significant negative correlation between postoperative corneal diameter and steep K. There was a positive correlation between postoperative IOP and anterior chamber angle. A negative correlation was found between postoperative cup to disc ratio and each of parameters of flat keratometry, steep keratometry, pachymetry at pupil centre and at thinnest location, and anterior chamber depth. Scheimpflug measures confirm the role of the cornea as the major contributor to the total astigmatism. They also highlight the importance of pachymetry measurements. The authors conclude Scheimpflug imaging provides important information on the biometric characteristics of the anterior segment of the eye in patients with PCG.
Scheimpflug imaging in paediatric glaucoma
Reviewed by Fiona Rowe
Scheimpflug imaging in operated primary congenital glaucoma.
CONTRIBUTOR
Fiona Rowe (Prof)
Institute of Population Health, University of Liverpool, UK.
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