Choroidal thickness in myopic and non-myopic children assessed with enhanced depth imaging optical coherence tomography

Read, Scott A., Collins, Michael J., Vincent, Stephen J., & Alonso-Caneiro, David (2013) Choroidal thickness in myopic and non-myopic children assessed with enhanced depth imaging optical coherence tomography. Investigative Ophthalmology and Visual Science, 54(12), pp. 7578-7586.

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Abstract

Purpose

To examine choroidal thickness (ChT) and its topographical variation across the posterior pole in myopic and non-myopic children.

Methods

One hundred and four children aged 10-15 years of age (mean age 13.1 ± 1.4 years) had ChT measured using enhanced depth imaging optical coherence tomography (OCT). Forty one children were myopic (mean spherical equivalent -2.4 ± 1.5 D) and 63 non-myopic (mean +0.3 ± 0.3 D). Two series of 6 radial OCT line scans centred on the fovea were assessed for each child. Subfoveal ChT and ChT across a series of parafoveal zones over the central 6mm of the posterior pole were determined through manual image segmentation.

Results

Subfoveal ChT was significantly thinner in myopes (mean 303 ± 79 µm) compared to non-myopes (mean 359 ± 77 µm) (p<0.0001). Multiple regression analysis revealed both refractive error (r = 0.39, p<0.001) and age (r = 0.21, p = 0.02) were positively associated with subfoveal ChT. ChT also exhibited significant topographical variations, with the choroid being thicker in more central regions. The thinnest choroid was typically observed in nasal (mean 286 ± 77 µm) and inferior-nasal (306 ± 79 µm) locations, and the thickest in superior (346 ± 79 µm) and superior-temporal (341 ± 74 µm) locations. The difference in ChT between myopic and non-myopic children was significantly greater in central foveal regions compared to more peripheral regions (>3 mm diameter) (p<0.001).

Conclusions

Myopic children have significantly thinner choroids compared to non-myopic children of similar age, particularly in central foveal regions. The magnitude of difference in choroidal thickness associated with myopia appears greater than would be predicted by a simple passive choroidal thinning with axial elongation.

Impact and interest:

32 citations in Scopus
31 citations in Web of Science®
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ID Code: 67898
Item Type: Journal Article
Refereed: Yes
Keywords: choroid, pediatric, optical coherence tomography, refractive error
DOI: 10.1167/iovs.13-12772
ISSN: 1552-5783
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Optical Technology (111302)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Optometry and Ophthalmology not elsewhere classified (111399)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Funding:
Copyright Owner: Copyright 2013 Association for Research in Vision and Ophthalmology
Deposited On: 27 Feb 2014 22:43
Last Modified: 03 Jun 2014 07:46

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