Hema Radhakrishnan

..To evaluate the changes in peripheral refraction profiles associated with myopia progression and treatment modalities used in the Cambridge Anti-Myopia Study...

..Hence it cannot be used to support or refute particular theories of presbyopia...

..The aim was to investigate the fluctuations in monochromatic ocular aberrations with accommodation and tear-film changes in moderate keratoconic eyes...

..5 min and 30 degrees respectively), the results fail to confirm the occurrence of large differences in peripheral refraction when measurements are made with eye turn rather than head turn...

..To evaluate the dynamic changes in refraction during the accommodative facility test in myopes and emmetropes...

..However, the results from Experiment 2 suggest that any such pressures during short-term reading tasks have no significant impact on the axial refraction...

..The change with age in the relationship between aberration and accommodation is interpreted in terms of the changing gradients of refractive index and surface curvatures of the crystalline lens...

..The aim was to study the link between refractive error and corneal biomechanical properties...

..036 DC at axis 176 deg for each dioptre of accommodation response. It is speculated that these changes might reflect increases in lens tilt about a horizontal axis, caused by the combined effects of a slacker zonule and gravity...

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..To assess visual performance and ocular aberrations in keratoconic patients using toric soft contact lenses (SCL), rigid-gas-permeable (RGP) contact lenses and spectacle lens correction...

..Alterations in central corneal power and axes, central corneal thickness, and corneal topography were also explored...

..Alterations in the anterior surface, central corneal powers and axes, and central corneal thickness were also explored...

..The aim was to study the variability in corneal and ocular aberrations in the human eye over one week and to determine the impact of age on corneal and crystalline lens aberrations and on the variability of these measurements...

..For each target the two refractive groups showed similar accommodative behavior...

..The present study aims to analyse head and eye movements in myopes and non-myopes for near-vision tasks...

..To investigate the relationship between refractive error and ocular biometry in healthy subjects using a new optical low coherence reflectometry device...

..Overall, while no differences in mean head posture were found between myopes and emmetropes, there was some evidence that head posture and movement during reading may differ in progressing myopes...

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..The aim was to determine the critical eccentricity at which two methods of elaborating peripheral wavefront measurements are significantly different and to characterise horizontal coma in healthy young adults...

..To explore the repeatability of lower-order and higher-order ocular aberrations measured in patients with keratoconus...

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..To compare central corneal thickness (CCT) and anterior chamber depth (ACD) measured using 3 different techniques...

..The aim of this study was to obtain intraocular forward light scatter (FLS) data in keratoconus patients and to explore possible relationships with contrast sensitivity...

..Measurement of ocular aberrations can provide an improved description of the optical quality of the eye and hence can be useful to the clinician in evaluating eyes with optical abnormalities...

..Interestingly, those subjects whose response/stimulus curves had a higher slope tended to display greater accommodative miosis, irrespective of their refractive error...

..To evaluate the repeatability of corneal thickness measurements over time, obtained with an Oculus Pentacam...

..To determine the origin of the wavefront aberration as measured in eyes fitted with diffractive intraocular lenses (IOLs)...

..This review describes the clinical features of PMD, its differential diagnosis and various management strategies presently available...

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..To estimate the variability of Scheimpflug imaging measurements over a 1-week period and to determine the impact of age on the measurements and on the variability of the parameters in the study...

..10 ± 1.72 D, median -1.63 D, range -0.83 to -6.00 D) and 10 emmetropes (mean spherical equivalent error -0.02 ± 0.35 D, median +0.08 D, range -0.50 to +0.50 D)...

..The increase in availability and popularity of the CXL technique accentuates the requirement for reliable and accurate techniques for measuring corneal biomechanical properties before and after treatment...

..To evaluate the effects of different contact lens-based artificial pupil designs on visual performance...

..To assess the feasibility of applying scanning acoustic microscopy (SAM) on UV cross-linked corneal tissue for mapping and analyzing its biomechanical properties...

..One consideration is whether higher-order aberrations (HOA) influence myopization. More knowledge of optics in anisometropic eyes might give further insight into the development of refractive error...

..The aim of this study was to evaluate ocular aberration changes through different simultaneous vision multifocal contact lenses (CLs)...

..To assess and compare the effects of contact-lens based artificial pupil design and monovision correction on visual performance...

..We investigate whether the asymmetrical loss shown by myopes to defocus can be explained by changes in sampling efficiency or equivalent noise, or both...

..The observed asymmetry in contrast sensitivity with positive and negative defocus in myopes may be linked to the altered accommodative response observed in this group...

..The effect of viewing distance on astigmatism or Mean Spherical Equivalent error was not significant. Our results do not support the view that myopia is associated with changes in peripheral refraction during distance or near vision...

..The reduced accommodative response known to occur in myopes may be due to the relatively small effect that negative lens blur has on their visual acuity...

..We suggest some improvements to the PowerRefractor measurement technique to standardize its clinical use and to improve accuracy...