J S Wolffsohn

..To investigate the mechanism of action of the Tetraflex (Lenstec Kellen KH-3500) accommodative intraocular lens (IOL)...

..To perform advanced analysis of the corneal deformation response to air pressure in keratoconics compared with age- and sex-matched controls...

..As light-emitting diodes become more common as the light source for low vision aids, the effect of illumination colour temperature on magnifier reading performance was investigated...

..The aim of this study was to carry out further psychometric evaluation with a larger sample and investigate the measure's sensitivity to MD severity...

..To assess the repeatability of Eger macular stressometer (EMS) measures of photostress recovery and determine their association with other measures of visual function...

..To determine whether eyes implanted with the Lenstec KH-3500 "accommodative" intraocular lenses (IOLs) have improved subjective and objective focusing performance compared to a standard monofocal IOLs...

..To compare the objective accommodative amplitude and dynamics of eyes implanted with the one-compartment-unit (1CU; HumanOptics AG, Erlangen, Germany) accommodative intraocular lenses (IOLs) with that measured subjectively...

..This study aimed to assess differences in clinical expediency of the CS increment-matched new back-lit and original paper versions of the Melbourne Edge Test (MET) to determine the CS of the visually impaired...

..This review examines recent advances in anterior segment imaging...

..To use previously validated image analysis techniques to determine the incremental nature of printed subjective anterior eye grading scales...

..The resolution and temporal properties of the analysis are therefore ideal for the simultaneous measurement of dynamic accommodation and pupil responses...

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..Additionally, the effects of tumours, foreign bodies and trauma can be localised, the corneal layers can be examined and the tear film thickness assessed...

..To examine the use of real-time, generic edge detection, image processing techniques to enhance the television viewing of the visually impaired...

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..To examine the potential barrier and lubricating effects of modern daily disposable contact lenses (DD) against airborne antigens...

..To examine the effect of uncorrected astigmatism in older adults...

..To determine the prevalence of ocular allergy in patients attending optometric practices in the UK West Midlands and the impact this has on patients' daily lives...

..To assess the repeatability of an objective image-analysis technique to determine intraocular lens (IOL) rotation and centration...

..To examine the objective clinical performance of 'comfort-enhanced' daily disposable contact lenses over a 16-h day...

..To determine the critical fitting characteristics of modern soft contact lens fits and from this to devise a simplified recording scheme...

..This study investigates the effect of cognitive effort on near-work induced transient myopia (NITM)...

..To compare the magnitude and time course of nearwork-induced transient myopia (NITM) in preadolescent Hong Kong Chinese myopes and emmetropes...

..The need for observing the retinal vasculature as well as measuring blood pressure for monitoring systemic hypertensive patients is discussed in relation to current research...

..25 DS from 0.5 to 20 cd m(-2) target luminance). The PowerRefractor also quantifies the direction of gaze and pupil size, but is unable to take measurements with small pupils <3.7 +/- 1.0 mm...

..To evaluate and compare the functional and perceived benefits of wearing coloured lenses by patients with age-related macular degeneration (ARMD)...

..The resolution properties of the analysis are shown to be ideal for measurement of dynamic accommodation and pupil responses...

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..To evaluate the accuracy of an open-field autorefractor compared with subjective refraction in pseudophakes and hence its ability to assess objective eye focus with intraocular lenses (IOLs)...

..To design and validate a vision-specific quality-of-life assessment tool to be used in a clinical setting to evaluate low-vision rehabilitation strategy and management...

..Although many studies have shown a subjective preference for yellow lenses, there has been little success in determining the clinical nature of this benefit...

..GPs indicated it was useful to receive details of their patient's BP when it was > 140/90 mmHg. The use of improved description of the retinal vasculature and stronger links between optometrists and GPs may enhance future patient care...

..The role of the optometrist in detecting, monitoring and appropriate referral of systemic hypertensives is discussed in relation to current research...

..The Shin-Nippon SRW-5000 autorefractor is therefore a valuable complement to subjective refraction and as it offers the advantage of a binocular open field-of-view, has a great potential benefit for accommodation research studies...

..05). CONCLUSIONS: Although EVES provide objective benefits to the visually impaired in reading speed and acuity, together with some specific near tasks, some can be performed just as fast using optical magnification...

..The case indicates that account needs to be taken of the possibility that relatively modest myopic shifts encountered in young adult contact lens wearers may be associated with concomitant systemic medication...

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..To assess the stability of the Akreos AO intraocular lens (IOL) platform with a simulated toric design using objective image analysis...

..The study evaluates the validity and repeatability of these measurements compared with current clinical instrumentation...

..To demonstrate the changes that have occurred in a developed world low vision population over the past three decades and to examine the present rehabilitation of the visually impaired attending a multi-disciplinary low vision clinic...

..CONCLUSIONS: The validity and repeatability of measurements provided by the IOLMaster will augment future studies in ocular biometry...

..CONCLUSION: It is appropriate to store anterior eye images at between 1280 x 811 and 767 x 569 pixel resolution and at up to 1:70 JPEG compression...

..To determine the most reliable and consistent method and time interval over which to implement a vision impairment quality of life assessment tool...

..Data confirm earlier informal experimental observations that only one in three individuals are likely to have access to a sympathetic inhibitory facility during sustained near vision...

..Theoretically myopes are required to exert more accommodation and vergence when wearing single vision contact lenses compared to glasses and hypermetropes less. This study aims to quantify the effects clinically...

..To evaluate the hypothesis that objective measures of open- and closed-loop ocular accommodation are related to systemic cardiovascular function, and ipso facto autonomic nervous system activity...

..To determine the best method of estimating the optimum magnification needed by visually impaired patients...

..A number of challenges remain and must be addressed before the ultimate goal of restoring youthful levels of accommodation to the presbyopic eye can be achieved...

..The characteristics and source of ocular surface temperature are also discussed...

..The study, therefore, enhances our understanding of biometric accommodative changes and demonstrates the utility of vergence analysis in the assessment of accommodation...

..Our improved scheme reduced AS-OCT errors and could, therefore, enhance pre- and postoperative assessments of keratorefractive or cataract surgery, including measurement of accommodating intraocular lenses...

..01). CONCLUSIONS: Release of additional non-functionalised PVA from the nelfilcon A lenses appears to enhance comfortable contact lens wear...

..To determine the dynamic emitted temperature changes of the anterior eye during and immediately after wearing different materials and modalities of soft contact lenses...

..To compare graticule and image capture assessment of the lower tear film meniscus height (TMH)...

..41 +/- 0.12 D; p < 0.01). CONCLUSION: While collimated HUD imagery stimulates the user to a more distant focus, the use of the WIVAR lines can cause additional relaxation of accommodation...

..These findings indicate for the first time that pupillary constriction associated with a coloured afterimage is mediated by the magno-cellular pathway...

..The results indicate that a /L - M/ linear chromatic mechanism, whereby a signal from the long wavelength cone is subtracted from that of the middle wavelength cone and vice versa, drives pupillary responses...

..To compare visual function with the Bausch & Lomb PureVision multifocal contact lens to monovision with PureVision single vision contact lenses...

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..To report differences in the incidence of adverse events and discontinuations found in a group of neophyte contact wearers using two different silicone hydrogel contact lenses on a daily- and continuous-wear basis during an 18-month period...

..As the most common ophthalmic surgery and with the expanding range of intraocular lens options, optometrists have an important and growing role in managing patients with cataract...

..To develop a questionnaire that subjectively assesses near visual function in patients with 'accommodating' intraocular lenses (IOLs)...

..75 [Mackool et al., J. Cataract Refract. Surg.32 (2006) 435]; IOL power (D) = 0.07x(2) + 1.27x + 1.22, where x = aphakic refraction [Leccisotti, Graefes Arch. Clin. Exp. Ophthalmol.246 (2008) 729]...

..This study determines whether letter sequences and/or lens presentation order ought to be randomised when measuring defocus curves...

..CONCLUSION: Although optometrists monitor the retina for signs of damage from systemic hypertension, further education in this important condition is warranted...

..Furthermore, the potential causes of rotation in toric lenses are identified, along with techniques for assessing and quantifying the amount of rotation and subsequent management options for addressing post-operative rotation...

..Instillation of fluorescein using a moistened floret or 1% minim seems most clinically appropriate as lower quantities and concentrations of fluorescein improve the efficiency of clinical examination...

..Thirteen symptom questions, eight nonocular and five ocular, were determined to be useful for a questionnaire specifically related to virtual reality viewing using a head-mounted display...

..To establish the sensitivity and reliability of objective image analysis in direct comparison with subjective grading of bulbar hyperaemia...

..To investigate objectively and noninvasively the role of cognitive demand on autonomic control of systemic cardiovascular and ocular accommodative responses in emmetropes and myopes of late-onset...

..Coupled with its accuracy, repeatability, and capability to measure corneal curvature, it is a valuable addition to objective instrumentation currently available to the optometrist and researcher...