Abstract
Purpose
To describe the anterior segment optical coherence tomography (AS-OCT) characteristics of patients with ocular manifestations of mucopolysaccharidoses type I (Hurler), II (Hunter), and VI (Maroteaux–Lamy).
Methods
Prospective, observational study of nine consecutive patients with variants of mucopolysaccharidosis (MPS) attending the Paediatric Ophthalmology service at Manchester Royal Eye Hospital, UK. All patients underwent Visante AS-OCT imaging as part of their ophthalmic assessment.
Results
Ocular involvement tended to be symmetrical. Angle-to-angle distance was significantly lower in MPS VI than in MPS I (P=0.04). Anterior chamber depth, angle opening distance, trabecular-iris space area, and scleral spur angle tended to be lower in MPS VI than in MPS I, but did not reach statistical significance. Corneal thickness in the central 0–2 mm zone was greater in MPS VI than in MPS I, approaching but not attaining statistical significance (P=0.07). The 2–5 and 5–7 mm zones were significantly thicker in MPS VI than MPS I (P=0.04, P=0.04). There was no difference in corneal thickness between MPS I and MPS VI in the peripheral 7–10 mm zone (P=0.57). Measurements of the patient with MPS II resembled the mean values of the MPS I group.
Conclusion
AS-OCT is valuable in quantifying anterior segment pathology in MPS. It suggests more crowded anterior segments and greater corneal thickness in patients with MPS VI than MPS I. AS-OCT is useful in evaluating the risk and mechanism of glaucoma in MPS patients, and may improve our assessment of the efficacy of systemic treatment.
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Acknowledgements
This research was facilitated by the Manchester Biomedical Research Centre and the Greater Manchester Comprehensive Local Research Network.
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JLA has received an educational grant from Biomarin Europe Ltd. The remaining authors declare no conflict of interest.
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Ahmed, T., Turnbull, A., Attridge, N. et al. Anterior segment OCT imaging in mucopolysaccharidoses type I, II, and VI. Eye 28, 327–336 (2014). https://doi.org/10.1038/eye.2013.281
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DOI: https://doi.org/10.1038/eye.2013.281
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