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Helen Owens

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Helen Owens

Senior Lecturer Optometry


Topographic indications of emerging keratoconus in teenage New Zealanders (2007)
Journal Article
Boyce, N. K., Bjornholdt, M. C., Gamble, G. D., Owens, H., Gamble, G. D., Bjornholdt, M. C., …Keung, L. (2007). Topographic indications of emerging keratoconus in teenage New Zealanders. Cornea, 26(3), 312-318. https://doi.org/10.1097/ICO.0b013e31802f8d87

PURPOSE: To screen a population of teenagers for emerging topographic signs of keratoconus (KC), with particular reference to ethnicity. METHODS: Corneal topography, visual acuity, and an environmental risk factor analysis were included in a screenin... Read More about Topographic indications of emerging keratoconus in teenage New Zealanders.

The Nepal longitudinal study: Biometric characteristics of developing eyes (2006)
Journal Article
Frith, M. J., Kinnear, R. F., Stewart, A. W., Garner, L. F., Garner, L. F., Stewart, A. W., …Frith, M. J. (2006). The Nepal longitudinal study: Biometric characteristics of developing eyes. Optometry and Vision Science, 83(5), 274-280. https://doi.org/10.1097/01.opx.0000215251.27409.16

PURPOSE. To identify differences in potential biometric markers for predicting refractive error in school children. METHODS. Biometric data on 895 Tibetan children, aged 6 to 18 years, residing in Katmandu, Nepal, were collected biennially from 1992... Read More about The Nepal longitudinal study: Biometric characteristics of developing eyes.

The relationship between the sagitta of the anterior corneal surface and refractive error of the eye (2004)
Journal Article
Garner, L. F., Garner, L. F., & Owens, H. (2004). The relationship between the sagitta of the anterior corneal surface and refractive error of the eye. Optometry and Vision Science, 81(8), 636-639. https://doi.org/10.1097/01.opx.0000141798.41340.8b

Changes in the sagitta of the anterior corneal surface associated with a change in the corneal radius of curvature have been used to calculate the change in refractive error of the eye in two areas: the ablation depth for laser surgery, and the chang... Read More about The relationship between the sagitta of the anterior corneal surface and refractive error of the eye.

Posterior corneal changes with orthokeratology (2004)
Journal Article
Owens, H., Garner, L. F., Craig, J. P., & Gamble, G. (2004). Posterior corneal changes with orthokeratology. Optometry and Vision Science, 81(6), 421-426. https://doi.org/10.1097/01.opx.0000135097.99877.5d

Purpose. To investigate changes in corneal thickness and the radius of curvature of the posterior corneal surface after orthokeratology (OK) rigid lens wear. Methods. Nineteen young myopic subjects wore reverse-geometry OK lenses (BE/ABE, Ultravision... Read More about Posterior corneal changes with orthokeratology.

A profile of keratoconus in New Zealand (2003)
Journal Article
Owens, H., & Gamble, G. (2003). A profile of keratoconus in New Zealand. Cornea, 22(2), 122-125. https://doi.org/10.1097/00003226-200303000-00008

Purpose. To examine the characteristics and risk factors for keratoconus in a New Zealand population. Methods. A one-page questionnaire was designed and sent to optometrists and ophthalmologists in New Zealand. Eye care practitioners then issued ques... Read More about A profile of keratoconus in New Zealand.

Accuracy of Orbscan II slit-scanning elevation topography (2002)
Journal Article
Cairns, G., McGhee, C. N., Collins, M. J., Owens, H., & Gamble, G. D. (2002). Accuracy of Orbscan II slit-scanning elevation topography. Journal of Cataract and Refractive Surgery, 28(12), 2181-2187. https://doi.org/10.1016/S0886-3350%2802%2901504-3

Purpose: To establish the accuracy of Orbscan II (Orbtek Inc.) slit-scanning elevation topography in analyzing the anterior surface of complex test objects. Setting: Discipline of Ophthalmology, University of Auckland, Faculty of Medical and Health S... Read More about Accuracy of Orbscan II slit-scanning elevation topography.

Effect of SoftPerm lens wear on corneal thickness and topography: A comparison between keratoconic and normal corneae (2002)
Journal Article
Owens, H., Watters, G., & Gamble, G. (2002). Effect of SoftPerm lens wear on corneal thickness and topography: A comparison between keratoconic and normal corneae. Clao Journal, 28(2), 83-87

Purpose. Complications related to contact lens-induced anoxia in the keratoconic eye are well documented, but the underlying mechanisms are poorly understood. This study compared topographical changes in corneal thickness and anterior corneal radius... Read More about Effect of SoftPerm lens wear on corneal thickness and topography: A comparison between keratoconic and normal corneae.

Tear spreading rates: Post-blink (2002)
Journal Article
Owens, H., & Phillips, J. R. (2002). Tear spreading rates: Post-blink. Advances in Experimental Medicine and Biology, 506, 1201-1204. https://doi.org/10.1007/978-1-4615-0717-8_170

The tear film plays a crucial role in the areas of contact lens wear and dry eye. However, despite its accessibility, there is no “gold-standard” test for assessing its functional quality. Current clinical tests are often poorly correlated with each... Read More about Tear spreading rates: Post-blink.

Spreading of the tears after a blink: Velocity and stabilization time in healthy eyes (2001)
Journal Article
Owens, H., & Phillips, J. (2001). Spreading of the tears after a blink: Velocity and stabilization time in healthy eyes. Cornea, 20(5), 484-487. https://doi.org/10.1097/00003226-200107000-00009

Purpose. To quantify the tear spreading velocity and stabilization time after blinks in healthy patients. Methods. Video recordings (magnification, ×130) were made of the movements of naturally occurring particles in the tear film while patients blin... Read More about Spreading of the tears after a blink: Velocity and stabilization time in healthy eyes.

Prevalence of myopia in Sherpa and Tibetan children in Nepal (1999)
Journal Article
Frith, M. J., Kinnear, R. F., Garner, L. F., Garner, L. F., Owens, H., Kinnear, R. F., & Frith, M. J. (1999). Prevalence of myopia in Sherpa and Tibetan children in Nepal. Optometry and Vision Science, 76(5), 282-285. https://doi.org/10.1097/00006324-199905000-00014

Background. Tibetan and Sherpa children living in Nepal share a common ancestry in Tibet and areas to the north of Nepal, but it is evident that these people experience widely contrasting educational and environmental conditions. The purpose of this... Read More about Prevalence of myopia in Sherpa and Tibetan children in Nepal.