Showing papers in "Ophthalmic and Physiological Optics in 1996"

TL;DR: A simple reading test that can be undertaken by disabled readers is described, revealing increases in the speed of reading when coloured overlays are used both in children who have made long-term use of coloured overlay for reading, and inChildren who will subsequently do so.

TL;DR: Although the relative contributions of PA and PV were large under the dual-OL condition, they were generally very small under the various CL conditions that simulated more naturalistic viewing situations, indicating that proximity may still play an important role by providing cues for attaining coordinated and harmonious motor responses under specific viewing conditions.

TL;DR: A novel method for testing the corneal nerve function, through non-invasive measurement of cornea sensitivity, through using a controlled pulse of air to stimulate the cornea through the aesthesiometer is presented.

TL;DR: It is concluded that a change of at least +/- 1.50 D should be adopted as the minimum significant shift in amplitude of accommodation for this group of young individuals.

TL;DR: Investigating the mechanism of this benefit by studying the optometric and visual perceptual characteristics of the children in the double‐masked study found that pattern glare, a sensitivity to striped patterns, was prevalent in the sample and was significantly associated with the subjects' symptoms.

TL;DR: From the results, the magnitude and extent of spatial interference across the visual field can be described quantitatively and serve as an example of how observed variations in peripheral threshold gradients might be achieved as a combination of underlying factors with different E2 values.

TL;DR: The implanted yellow-tinted IOL showed improved contrast sensitivity in the middle spatial frequencies of 6 and 12 c/deg in photopic and mesopic vision and decreased the effect of central glare on the contrast sensitivity.

TL;DR: These norms are presented for clinical use against which measurements on an individual paediatric or non‐verbal patient can be compared and will determine whether specific patient populations, e.g. patients with cerebral palsy or low vision, demonstrate normal or reduced accommodation.

TL;DR: In this paper, the authors measured intraocular pressure (IOP) at yearly intervals, from age 7 to 9 years, in 106 Chinese children and found that the incident group had higher IOP following onset of myopia than it was prior to onset whereas there was no difference in the IOP of the control groups over the same period.

TL;DR: Topographic evaluation of a potential fourth variety of cone shape in keratoconus revealed its dependence on gaze direction which may account for apparent differences in progression patterns between round and bow-tie cones.

TL;DR: In a placebo-controlled experiment comprising 22 healthy men, visual acuity and refraction were only significantly affected at a breath alcohol level of 0.1%, and contrast sensitivity, stereoacuity and binocular vision were affected both at BrAC 0.05% and BrAC0.1%.

TL;DR: The presence of reduced accommodation was found to be associated with reduced visual acuity, but was not associated with cognitive or communication ability, refractive error or age, and these findings have developmental and educational implications.

TL;DR: Results show that fluctuations with an LFC were present in all three intraocular distances but not in the axial length, proving that only the lens was involved, and no HFC was present in fluctuations of AC depth and lens thickness.

TL;DR: The authors found a significant correlation between flicker threshold and binocular instability, thus linking sensory and motor visual correlates of dyslexia, and further new analyses on the interaction between optometric variables and the psychometric measurement of coding skills.

TL;DR: It is concluded that high mesopic levels of road luminance produced by street and vehicle lighting are normally too great to allow significant refractive shifts to occur, although acuity will be reduced due to light‐dependent neural changes.

TL;DR: Both NCTs should be useful for measuring IOP as part of a screening protocol for glaucoma, subject to these limitations.

TL;DR: The optometrist has a role in helping a patient with AD, if it is believed that signs and symptoms of the disease are present, so as to optimize visual function and improve the quality of life.

TL;DR: A novel computer software method was used to quantify the conjunctival plexus on the scleral background for measurement of the vascular surface area from photographs and showed sufficient sensitivity in detecting increased hyperaemia in the RGPCL wearing group and demonstrated statistically significant change.

TL;DR: Stereoacuity was worse in subjects with a large VA difference between the two eyes; the correlation between stereoacuity and VA difference was significant and reinforces the use of a > or = 70% stereothreshold when attempt stereoACuity results to compare with other studies.

TL;DR: A new model eye satisfying this assessment criterion is required for investigations of the visual performance of the eye, as current model eyes do not predict the average experimental values of the spherical aberration.

TL;DR: There is a definite reduction in response seen with a 0.4 ND filter, indicating that the VERIS system should have similar sensitivity in detection of retinal lesions to the commonly used visual field analysis systems.

TL;DR: The relative misting performance of crown glass, CR39 and polycarbonate spectacle lenses were assessed using a novel technique to measure the contrast transmission of the spectacle lens as it demister.

TL;DR: The data show that a frame which allows an adequate field of vision at night could cause a marked visual field defect during daylight hours, and a model and rule-of-thumb is given to determine the size of these potential defects and suggestions are given to minimise or eliminate them.

TL;DR: The reliability of visual acuity recorded in the better eye closely approximates to that previously found in normal adults, whilst that of the poorer eye appears more comparable to that of adult clinical populations.

TL;DR: Phakometry appears to be a feasible and useful technique for documenting the role of the crystalline lens in infant ocular development and calculated values for lens power and equivalent index may undergo substantial decline with age.

TL;DR: Further research is required to determine the specific source of the neurological deficits in DCD but a problem with the integrity of the afferent visual pathway does not appear to be a causal factor.

TL;DR: The results suggest that form deprivation and retinal defocus (induced by +/- 10 D lenses) could still induce experimental refractive errors (myopia and hyperopia) in chicks kept under continuous light, but the effects of form deprivation or defocus were partially suppressed by continuous light.

TL;DR: Results show that fluctuations with an LFC were present in all three intraocular distances but not in the axial length, proving that only the lens was involved, and no HFC was present in fluctuations of AC depth and lens thickness.

TL;DR: The output of the accommodative vergence cross‐link, the AC/A ratio, was measured before and after subjects viewed through a telestereoscope which increased their interocular separation approximately fourfold.

TL;DR: In this article, a method for calculating the radius of curvature of the anterior surface of the lens from the measured heights of the Purkinje image PI and PIII is presented.