The morphology of the anterior eye in three different angles of vertical gaze
Read, Scott A., Collins, Michael J., Carney, Leo G., & Iskander, D. Robert (2006) The morphology of the anterior eye in three different angles of vertical gaze. Clinical and Experimental Optometry, 89(2), p. 105.
Aim: To investigate the normative values of a range of biometric
measures of the anterior eye in three different angles of vertical
gaze in a population of young subjects.
Methods: High resolution digital images of the right eye were
taken of 100 young subjects in primary gaze and 20 degree and 40
degree downward gaze. The images were analysed using customwritten
Results: Highly significant changes were found in the horizontal
and vertical palpebral fissure dimensions, the palpebral fissure
angle and the eyelid contour as a function of angle of gaze
(p < 0.01 for all dimensions). The palpebral fissure narrows in the
vertical dimension (from an average vertical palpebral aperture
width for Caucasian subjects in primary gaze of 9.7 ± 1.2 mm to an
average of 6.4 ± 1.1 mm in 40 degree down-gaze), shortens in the
horizontal dimension (from average horizontal palpebral aperture
width of 27.1 ± 1.5 mm in primary gaze to an average of 25.6 ±
1.8 mm in 40 degree down-gaze) and becomes more ‘downslanted’
with increasing downward gaze. Significant changes also
occur to the upper and lower eyelid contour in down-gaze. Some
dimensions of the anterior eye were found to differ significantly as
a function of gender and ethnicity.
Conclusion: The dimensions of the anterior eye undergo
highly significant changes in downward vertical gaze. These
changes highlight the dynamic nature of the anterior ocular
structures that were measured. As many visual tasks are performed
in various angles of downward gaze, these findings have
implications for ocular surgery and the design and fitting of
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|Item Type:||Journal Article|
|Additional Information:||For more information, please refer to the journal's website (see hypertext link) or contact the author.|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)|
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
|Divisions:||Current > Research Centres > Centre for Health Research|
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
|Copyright Owner:||Copyright 2006 Blackwell Publishing|
|Deposited On:||18 Jan 2008|
|Last Modified:||22 Apr 2010 03:04|
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