All Outputs (307)

The Nepal longitudinal study: Biometric characteristics of developing eyes (2006)
Journal Article
Frith, M. J., Kinnear, R. F., Stewart, A. W., Garner, L. F., & Owens, H. (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.

A double-blind, placebo-controlled investigation of the effects of two doses of a valerian preparation on the sleep, cognitive and psychomotor function of sleep-disturbed older adults (2004)
Journal Article
Diaper, A., & Hindmarch, I. (2004). A double-blind, placebo-controlled investigation of the effects of two doses of a valerian preparation on the sleep, cognitive and psychomotor function of sleep-disturbed older adults. Phytotherapy Research, 18(10), 831-836. https://doi.org/10.1002/ptr.1574

One of the most popular herbal remedies for the alleviation of sleep problems is valerian. However, research into valerian is sparse, and studies differ greatly with respect to design, measures, and preparations used. This clinical study used standar... Read More about A double-blind, placebo-controlled investigation of the effects of two doses of a valerian preparation on the sleep, cognitive and psychomotor function of sleep-disturbed older adults.

The relationship between the sagitta of the anterior corneal surface and refractive error of the eye (2004)
Journal Article
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.

Speed and accuracy of head- and eye-based aiming systems at high vertical acceleration (2004)
Journal Article
Ineson, J., Durnell, L., Ebbage, J. L., Jarrett, D. N., Neary, C., & Reed, M. A. (2004). Speed and accuracy of head- and eye-based aiming systems at high vertical acceleration. Aviation, Space, and Environmental Medicine, 75(5), 420-428

BACKGROUND The benefits of using a head tracker in a fast jet to aim weapons and control sensor direction have been amply demonstrated, but head direction is difficult to control at high G. An experiment was conducted to assess whether aiming usin... Read More about Speed and accuracy of head- and eye-based aiming systems at high vertical acceleration.

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.

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.

Age dependence of ocular biometric measurements under cycloplegia with tropicamide and cyclopentolate (1998)
Journal Article
Owens, H., Garner, L. F., Yap, M. K., Frith, M. J., & Kinnear, R. F. (1998). Age dependence of ocular biometric measurements under cycloplegia with tropicamide and cyclopentolate. Clinical and Experimental Optometry, 81(4), 159-162. https://doi.org/10.1111/j.1444-0938.1998.tb06774.x

Background: Cyclopentolate continues to be the cycloplegic of choice for refracting young children, although many studies of ocular biometry promote the use of tropicamide. Methods: To clarify the role of drug type in biometric measurements, cyclople... Read More about Age dependence of ocular biometric measurements under cycloplegia with tropicamide and cyclopentolate.

Radius of curvature of the posterior surface of the cornea (1997)
Journal Article
Garner, L., Owens, H., Yap, M., Frith, M., & Kinnear, R. (1997). Radius of curvature of the posterior surface of the cornea. Optometry and Vision Science, 74(7), 496-498

The radius of curvature of the posterior surface of the cornea was measured in the vertical meridian for 120 children aged 6 to 17 years, using a Purkinje image method. The mean radius of curvature (+/-SD) was 6.42 +/- 0.31 mm, with a range from 5.62... Read More about Radius of curvature of the posterior surface of the cornea.

The effect of 3D virtual images on eye movement control (1996)
Journal Article
Neary, C. (1996). The effect of 3D virtual images on eye movement control. Investigative Ophthalmology & Visual Science, 36, 784

Purpose. To examine oculomotor responses to targets presented within a non-immersive stereoscopic (3D) display where accommodation and vergence cues to depth conflict. Methods. A liquid crystal frame sequential shuttering system was used to create th... Read More about The effect of 3D virtual images on eye movement control.

Oculomotor responses to perspective grid line drawings (1996)
Journal Article
Fulford, K., Findlay, J. M., & Neary, C. (1996). Oculomotor responses to perspective grid line drawings. Investigative Ophthalmology & Visual Science, 36, 783

Purpose. Can disconjugate eye movements be triggered by pictorial depth cues? If they could, this would facilitate eye pointing to three-dimensional displays. Method. Eye movement responses were measured as subjects shifted their gaze from a central... Read More about Oculomotor responses to perspective grid line drawings.

An evaluation of the keratoconic cornea using computerised corneal mapping and ultrasonic measurements of corneal thickness (1996)
Journal Article
Owens, H., & Watters, G. (1996). An evaluation of the keratoconic cornea using computerised corneal mapping and ultrasonic measurements of corneal thickness. Ophthalmic and Physiological Optics, 16(2), 115-123. https://doi.org/10.1046/j.1475-1313.1996.95000178.x

Reports indicate the presence of up to three independent cone shapes in keratoconus (round/oval/global) but the preponderance of one cone over another is unclear. This work evaluates keratoconic corneal topography and corneal thickness using videoker... Read More about An evaluation of the keratoconic cornea using computerised corneal mapping and ultrasonic measurements of corneal thickness.

Keratoconus in monozygotic twins in New Zealand (1995)
Journal Article
Walters, G. A., Owens, H., & Watters, G. (1995). Keratoconus in monozygotic twins in New Zealand. Clinical and Experimental Optometry, 78(4), 125-129. https://doi.org/10.1111/j.1444-0938.1995.tb00805.x

We report on a case of keratoconus in identical twins who were brought up in Christchurch, New Zealand. Videokeratoscopy using an EyeSysa (EyeSys Laboratories, Houston, Texas, USA) revealed not only marked differences in severity of keratoconus betwe... Read More about Keratoconus in monozygotic twins in New Zealand.

Helmet slippage during visual tracking: The effect of voluntary head movements (1993)
Journal Article
Neary, C., Bate, I. J., Heller, L. F., & Williams, M. (1993). Helmet slippage during visual tracking: The effect of voluntary head movements. Aviation, Space, and Environmental Medicine, 64(7), 623-30

The influence of visual tracking on head movement and on the head/helmet system was investigated for two different helmets (a motorcycle helmet and a flying helmet) under static laboratory conditions. Subjects visually refixated between pairs of illu... Read More about Helmet slippage during visual tracking: The effect of voluntary head movements.

Pharmacological effects on accommodative adaptation (1992)
Journal Article
Gilmartin, B., Bullimore, M., Rosenfield, M., Winn, B., & Owens, H. (1992). Pharmacological effects on accommodative adaptation. Optometry and Vision Science, 69(4), 276-284

We review the research which has attempted to determine whether the characteristics of autonomic innervation of ciliary smooth muscle are relevant to the process of accommodative adaptation. The effect of various topical autonomic drugs on the three... Read More about Pharmacological effects on accommodative adaptation.

Some visual, optometric and perceptual effects of coloured glasses (1991)
Journal Article
Wilkins, A., & Neary, C. (1991). Some visual, optometric and perceptual effects of coloured glasses. Ophthalmic and Physiological Optics, 11(2), 163-171. https://doi.org/10.1111/j.1475-1313.1991.tb00216.x

We examined 20 individuals who had worn coloured glasses (Irlen filters) for a period of at least 3 months and who claimed to find them beneficial. Sixteen had a history of reading difficulties. The performance of a variety of visual tasks was compar... Read More about Some visual, optometric and perceptual effects of coloured glasses.

The frequency characteristics of accommodative microfluctuations for central and peripheral zones of the human crystalline lens (1990)
Journal Article
Winn, B., Pugh, J., Gilmartin, B., & Owens, H. (1990). The frequency characteristics of accommodative microfluctuations for central and peripheral zones of the human crystalline lens. Vision Research,

Temporal variations in the nominally steady-state accommodation response can be characterized approximately by two principal regions of dominant activity: a low frequency region (LFR less than 0.6 Hz) and a high frequency region (HFR greater than 1.0... Read More about The frequency characteristics of accommodative microfluctuations for central and peripheral zones of the human crystalline lens.