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Luminance and thresholding limitations of virtual reality headsets for visual field testing

by Changseok Lee, Liam Redden, Vivian Eng, Brennan Eadie

Purpose

To investigate the luminance capacity and achievable threshold levels of commercially employed virtual reality (VR) devices for visual field testing.

Methods

This two-part study included (1) a literature review of VR headsets used for perimetry with luminance data extracted from technical specifications in publications and manufacturers; and (2) empirical evaluation of three most employed VR headsets in the literature using a custom virtual testing environment.

Results

Three most employed VR devices for visual field testing were Pico Neo, Oculus Quest, and HTC Vive. The maximum reported luminance was 250 cd/m2 for the HTC Vive Pro. Information on luminance measurement was not consistently available, reporting only handheld luminance meters. Empirical measurements show that handheld luminance meters significantly overestimate luminance compared to standard spectroradiometers. Measured luminance varies significantly across aperture size and decreases for peripheral stimuli up to 30 degrees peripherally. Assuming conventional background of 10 cd/m2, the best performance with lowest possible thresholding was with HTC Vive at 16dB, corresponding to luminance of 80 cd/m2 centrally. Oculus Quest 2 and Pico Neo 3 had minimum threshold of 20dB.

Conclusion

Commercially available VR devices do not meet luminance requirements or threshold sensitivities for visual field testing. Current VR technology is not designed—nor has the capacity—to threshold at mid-to-low dB ranges, which limits accuracy in diagnosing and monitoring defects seen in glaucoma. Translational Relevance: This study highlights the technical limitations of current commercially available VR devices for visual field testing and significant variables in evaluating luminance performance in these devices.

Interventions delivered in healthcare settings to promote vaping cessation in children and young people (under the age of 18 years): a scoping review protocol

Por: Hoo Chuin Shen · M. · Gabriel · M. M. · Brennan · L. · Isba · R.
Introduction

Vaping among children and young people (CYP) has increased globally over the past decade, with rates stabilising in the UK in recent years. Factors such as curiosity, social influence, stress management and attractive flavours contribute to its popularity. Although the long-term health impacts are uncertain, vaping poses risks including nicotine dependence, cardiovascular and respiratory issues, and cognitive impairment, though evidence on long-term effects is still emerging. Despite established smoking cessation programmes for adults, tailored resources for vaping cessation among CYP remain scarce, particularly within healthcare settings, which offer unique opportunities for professional intervention and ongoing support. The objective of this review is to assess the extent and nature of available literature on interventions delivered in healthcare settings to support vaping cessation among CYP under the age of 18 years.

Methods and analysis

This scoping review will include studies targeting CYP under the age of 18 years, specifically focusing on interventions delivered within healthcare settings. Studies outside healthcare contexts or those without healthcare provider involvement will be excluded. Additionally, interventions delivered solely to parents or carers will not be considered.

A comprehensive search will be conducted in MEDLINE, Embase, Web of Science, Cochrane Library and CINAHL from January 2004 to present, with additional grey literature from sources including grey literature repositories and Google Scholar. Results will be imported into Rayyan for screening, with two independent reviewers assessing studies for inclusion. Data extraction will include study design, population characteristics (including explicit age ranges, specifically CYP under 18 years), intervention details and outcomes. A descriptive synthesis will map study characteristics, while thematic analysis will identify intervention themes and healthcare contexts.

Ethics and dissemination

Ethics approval is not required for this secondary analysis. Findings will be disseminated through publication, conference presentations and shared with public health stakeholders.

How does trauma informed care education for paediatric healthcare professionals impact self-reported knowledge and practice: an integrative review by Thorton et al

Por: Brennan · G.

EBN Contemporary Nursing Education on: Thornton et al. 2025, How does trauma informed care education for paediatric healthcare professionals impact self-reported knowledge and practice. An integrative review. Nurse Education in Practice. 82.

Implications for nursing education

  • Healthcare professionals reported improved awareness and understanding of trauma-informed care (TIC) and self-efficacy in applying it in practice.

  • Nurse educators should continue to develop robust evaluation of TIC educational interventions.

  • Context

    Psychological trauma is a major public health concern, with high rates of exposure among the population. Within paediatric healthcare settings, exposure can be substantial.1 Such experiences are not always ‘one off’ events but are closely related to adverse childhood experiences (ACEs) such as abuse by caregivers, family dysfunction, parental mental health issues, substance abuse or domestic abuse. Such exposure can have a significant impact on child development, resulting in significantly poorer physical and mental...

    Effects of weight loss and weight gain on HbA1c, systolic blood pressure and total cholesterol in three subgroups defined by blood glucose: a pooled analysis of two behavioural weight management trials in England

    Por: Pidd · K. · Breeze · P. · Ahern · A. · Griffin · S. J. · Brennan · A.
    Objectives

    To estimate the association between weight and cardiometabolic risk factors across subgroups of individuals with normoglycaemia, non-diabetic hyperglycaemia and type 2 diabetes (T2D) and to explore whether the association differs between weight loss and weight gain.

    Design

    Observational analysis using mixed-effects regression models of pooled trial data.

    Participants

    The Weight loss Referral for Adults in Primary care (n=1267) and Glucose Lowering through Weight management (n=577) trials recruited individuals with overweight or obesity (body mass index, BMI >25 kg/m2) from primary care practices across England.

    Primary and secondary outcome measures

    The primary outcome measures were the relationships between a change in (BMI; kg/m2) and a change in glycated haemoglobin (HbA1c; mmol/mol), total cholesterol (mmol/L) or systolic blood pressure (SBP; mm Hg) across three subgroups of individuals with: normoglycaemia, non-diabetic hyperglycaemia and T2D. Secondary outcomes included the influence of weight loss versus weight gain on these relationships.

    Results

    HbA1c is positively related to a change in BMI, and a 1 kg/m2 change was related to a 1.5 mmol/mol (95% CI: 1.1 to 1.9) change in HbA1c in individuals with T2D, 0.6 mmol/mol (95% CI: 0.4 to 0.8) change in those with non-diabetic hyperglycaemia and 0.3 mmol/mol (95% CI: 0.2 to 0.4) change in those with normoglycaemia. In individuals with normoglycaemia, weight gain has a larger impact on HbA1c than weight loss, with a 0.5 mmol/mol (95% CI: 0.3 to 0.7) increase per 1 kg/m2 gained, compared with a relationship that is 0.3 mmol/mol smaller (95% CI: –0.6 to –0.1) per 1 kg/m2 of weight loss. BMI reduction improved SBP and total cholesterol significantly; however, effects did not differ between the three subgroups.

    Conclusions

    Cardiometabolic risk factors are associated with changes in weight. The association with HbA1c varies by diabetes status, with increasing magnitude in those with non-diabetic hyperglycaemia and T2D. Weight gain has a larger impact on HbA1c than weight loss in individuals with normoglycaemia, implying an asymmetric relationship.

    Another gap on the rota: a scoping review of attrition from specialty training in secondary care

    Por: Gillespie · H. · Brown · M. E. L. · Brennan · N. · Burford · B. · Vance · G.
    Background

    The healthcare workforce is in crisis. Despite a competitive selection process, a substantial number of doctors leave specialty training (ST) programmes prematurely. This attrition causes increased costs for the National Health Service, exacerbates workforce shortages and threatens quality and safety of care. It also increases pressure on trainees who remain, further compounding the risk of attrition. There is an urgent need to understand why doctors leave ST in order to find ways to maintain the training pipeline from ST to consultant.

    Objectives

    We aimed to understand what is known about why doctors choose to leave ST programmes in secondary care, to map current knowledge and identify avenues for future research.

    Eligibility criteria

    All studies which investigated why doctors leave ST programmes in secondary care were included.

    Sources of evidence

    Ovid Medline, Web of Science, SCOPUS and EMBASE were searched until January 2024. Descriptive codes were assigned to the findings of each study. These descriptive codes were reviewed and grouped together in broader categories.

    Charting methods

    Data was extracted and charted, and a qualitative content approach was used to synthesise data.

    Results

    A total of 6079 potentially relevant abstracts were retrieved, of which 23 were included in the final analysis. This included the experience of 1896 doctors who have left training and 454 programme directors. Doctors chose to leave training programmes because (1) they felt unsupported and underappreciated, (2) training was associated with unacceptable personal costs and (3) career prospects were unattractive.

    Conclusion

    There is a mismatch between trainees’ expectations of ST and the reality of being a trainee in ST. Understanding the issues which drive attrition and developing evidence-based solutions, has the potential to both reduce attrition, and improve the training experience for doctors in training more widely.

    Nurse practitioners' use of diagnostic imaging: A scoping review

    Abstract

    Aim

    To explore the nature and extent of peer-reviewed literature related to the use of diagnostic imaging by nurse practitioners (NPs) to inform future practice and research.

    Background

    Nurse practitioners undertake advanced assessment, diagnosis, and management of patients, including requesting and interpretation of diagnostic imaging. It is unclear what evidence exists related to the quality use of radiological investigations by NPs in recent years.

    Design

    A scoping review based on the steps suggested by the Joanna Briggs Institute.

    Methods

    A structured review of the databases Medline, CINAHL and Embase was undertaken using the keywords and MESH terms ‘nurse practitioner’, ‘medical imaging’, ‘diagnostic imaging’, ‘scan’ and ‘radiography’. Only English language articles were included, and no date limit was applied. Database review was completed on 30 May 2021.

    Results

    Eight themes were identified—country and clinical context, requesting diagnostic imaging, performing diagnostic imaging, image-guided interventions, interpreting diagnostic imaging, training education and knowledge, impact on resource usage and comparison with medical practitioners. There were more studies across a greater breadth of clinical specialties and imaging modalities in the United States than in other countries. Nurse practitioner practice is frequently benchmarked against that of medical colleagues. There is a paucity of studies focusing on educational preparation and the lack of relevant university curricula for NPs around diagnostic imaging.

    Conclusion

    There are significant gaps in the evidence outside of the United States across several of the identified themes. Further studies are needed to explore NP access to and use of diagnostic imaging and to understand the barriers and facilitators to this.

    Relevance to Clinical Practice

    Studies from four countries were included in this review. The evidence suggests that, where studied, nurse practitioners (NPs) can safely and appropriately request and interpret plain x-rays in the emergency and minor injuries setting. Further research is needed to evaluate the educational needs of NPs in relation to diagnostic imaging and their use of advanced imaging techniques, particularly outside of the United States.

    Patient or Public Contribution

    No patient or public contribution.

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