Thesis Title: Ocular changes associated with accommodation and convergence
Hamed’s doctoral research studies are focusing on the ocular changes associated with accommodation and convergence, with a primary focus on how the sclera (the white, outer coat of the eye) changes when near tasks are performed. As the sclera plays an important role in the determination of ocular size and shape, this research may provide new insight into the ocular changes associated with near work and the potential role of these changes in myopia development and progression. Therefore in the first phase of Hamed’s PhD research, the cornea, limbus, and anterior sclera have been evaluated using the Eye Surface Profiler (ESP) while viewing targets requiring different levels of near focussing.
The Eye Surface Profiler is a newly released instrument based on Fourier transform profilometry and provides measurements of the ocular surface topography across a much wider area than was previously possible (out to a 16 mm diameter). Using the ESP instrument we are able now to measure the topographic parameters of the anterior sclera. This technique uses two fringe pattern projectors to capture the anterior eye surface contour, and allows the changes in the anterior sclera with accommodation and convergence to be comprehensively assessed.
2017 ARVO-ASIA Meeting, Brisbane Convention and Exhibition Centre, 5-8 February, Brisbane, AUSTRALIA
Thesis Title: Optics of the eye and refractive error development
Myopia commonly manifests and progresses throughout childhood. Excessive near work has been implicated as a risk factor, however the causative link between myopia and near work is yet to be established. In adults, ocular wavefront aberrations and the axial length of the eye are known to undergo transient changes during accommodation, however little is known about these changes during childhood; therefore, the optical and structural changes of the eye during accommodation in children is of significant interest. This program of research is examining the short-term optical and structural changes in the eyes of children during accommodation by measuring ocular biometry and aberrations while varying the accommodative demand.
COAS-HD Wavefront Aberrometer modified with Badal optical system to induce accommodation
Change in anterior chamber depth and lens thickness during accommodation (8 D) as imaged using the IOLMaster 700
Vision 2020 – Rising Stars in Eye Health and Vision Care, Parliament House, 12-13 September 2017, Canberra, AUSTRALIA
Swee Chai Teoh
Thesis Title: The Eye’s Response to Vergence and Diffuse Blur
Swee Chai’s research is focused on the eye’s response to diffuse and defocus blur. Whilst animal studies have provided information about the emmetropisation process, it is not known how human eyes encode blur in modulating the growth of eyes. This study will provide insight into the understanding of the blur detection mechanism and the capability of human eyes to discern the direction of blur.
Thesis Title: Physiological corneal changes associated with scleral contact lens wear
Damien’s research will examine the physiologic effects of scleral lenses on the cornea. While scleral lenses form a small percentage of contact lens usage, they still provide great visual benefit to those that suffer corneal irregularities. Further understanding of corneal oedema and how this relates to various fitting parameters of scleral lenses will be investigated.