Displaying items by tag: vision

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The implication of vision in traffic accidents and the importance of political action to treat this risk factor.

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Article from the magazine "Point de vue"

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Various national and private sector educational systems in most societies are converging towards a full digitization of teaching resources, producing an increasing shift in the educational paradigm.
Regardless of the advantages that full digitization can provide within the educational field, we have to ask ourselves if the reading, visual, and cognitive
performance is the same between formats: digital vs. printed.
This has been a hot topic that has received much attention from various academic disciplines. In this series of three articles, we intend to address the issue from a multidisciplinary perspective—paying special attention to the implications that, from our point of view, are more relevant for the optometric practitioner. In this first article, we look at visual activities at school and the relationship between visual and academic abilities as we review the possible differences that may arise during reading in both formats.

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Article from the magazine "Point de vue"

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In this second part of our series, we will briefly analyse the differences between digital and print formats. Since these differences cause certain changes in posture, ergonomics, cognition and visual abilities, they come with the emergence of a series of symptoms that have been categorized under the label - Digital Eye Strain (DES).
However, we note that the differences between these two formats can cause differences in the reader’s development and visual performance in reading activities.

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Article from the magazine "Point de vue"

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In this third and final part of our series, we dissect some possible solutions to minimize the potential visual problems linked to the continued use of digital
devices at school. We discuss certain issues related to prescribing ametropias and diagnosing Binocular Dysfunctions and Non-Strabismic Accommodation
in this said environment, and we will present our conclusions.

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Article from the magazine "Point de vue"

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The refraction technique traditionally used to determine the corrective cylinder for a prescription has changed very little over the years, mainly due to the limitations imposed by subjective phoropters, which present lenses in increments usually no smaller than 0.25 D.
Today, thanks to phoropters with continuous power changes that allow to simultaneously and accurately act on sphere, cylinder and axis, it is now possible to develop new refraction techniques. This series of three articles describes the principles of a new vectorial method for determining the corrective cylinder and presents the rationale for an associated automated cylinder search algorithm.

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Article from the magazine "Point de vue"

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The refraction technique traditionally used to determine the corrective cylinder for a prescription has changed very little over the years, mainly due to the limitations imposed by subjective phoropters, which present lenses in increments usually no smaller than 0.25 D.
Today, thanks to phoropters with continuous power changes that allow to simultaneously and accurately act on sphere, cylinder and axis, it is now possible to develop new refraction techniques. This series of three articles describes the principles of a new vectorial method for determining the corrective cylinder and presents the rationale for an associated automated cylinder search algorithm.

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Article from the magazine "Point de vue"

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The refraction technique traditionally used to determine the corrective cylinder for a prescription has changed very little over the years, mainly due to the limitations imposed by subjective phoropters, which present lenses in increments usually no smaller than 0.25 D.
Today, thanks to phoropters with continuous power changes that allow to simultaneously and accurately act on sphere, cylinder and axis, it is now possible to develop new refraction techniques. This series of three articles describes the principles of a new vectorial method for determining the corrective cylinder and presents the rationale for an associated automated cylinder search algorithm.

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Article from the magazine "Point de vue"

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Although the effect of vertex distance on optical correction is well known, it is rarely taken into account in practice, except in cases of very strong corrections. When ophthalmic lenses were offered only in 0.25 D increments, this had little influence on most corrections.
But today, with refraction determined in 0.01 D increments* and the lenses associated with them, knowledge and measurement of vertex distance becomes particularly important. This article reviews the optical effects of vertex distance, shows how eye-to-phoropter distance can vary and discusses how vertex distance can now be taken into account for an accurate calculation of corrective lens power.

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Article from the magazine "Point de vue"

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One of the most common disorders of binocular vision encountered in the eye clinic is convergence insufficiency (CI). Population studies estimate upwards of 8% of the population suffer from convergence insufficiency, with the incidence increasing with age. Convergence insufficiency results with vergence ability at near is unable to match vergence demand. When this occurs, sensory fusion may be disrupted leading to intermittent diplopia, asthenopia, and fatigue. Clinicians should be able to quickly screen for abnormalities in convergence ability of a patient and provide a thorough evaluation of binocular ability when indicated. Many patients will respond well to vergence therapy, leading to both an increase in fusional vergence ability and a subsequent decrease in symptoms.

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Article from the magazine "Point de vue"

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Vision is intimately linked with our ability to navigate our environment and can strongly affect our mental, physical and economic well-being.

Losing one’s vision through an eye injury can lead to substantial long-term costs, and impact on an individual and their family & community. Eye injuries occur in a range of environments, including in the workplace, during sports and at home. Young working males are at the highest risk of eye injury. Up to 90% of eye injuries are preventable, with effective interventions including; education about the hazards, policies and training on the correct use of eye protection. Eye health professionals can play an important role in promoting and prescribing eye injury prevention strategies to help reduce this avoidable cause of vision loss.

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Article from the magazine "Point de vue"