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. 2014 Oct 2;43(1):36. doi: 10.1186/s40463-014-0036-4

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© Macdonald et al.; licensee BioMed Central Ltd. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Definitions of the measurements used in this study. 1. Nasal eyebrow (NEP), the distance from the medical canthus to lower eyebrow. 2. Central eyebrow (CEP), the distance from the upper lid margin to the lower eyebrow in the mid-pupil plan. 3. Temporal eyebrow (TEP), the distance from the lateral canthus to the lower eyebrow. 4. Margin pupil distance (MPD), the distance from the central upper lid margin to the centre of the pupil.