A lantern color vision test for the rail industry

Hovis, Jeffery K.; Oliphant, David

doi:10.1002/1097-0274(200012)38:6<681::aid-ajim8>3.0.co;2-4

Cited by 14 publications

(5 citation statements)

References 23 publications

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“…for the rail industry [45]. Vingrys AJ and Cole BL, in their literature review to determine whether colour vision standards were justified for the transport industry, found that CVD observers made more errors and had significantly slower reaction times in recognising coloured signal lights [46].…”

Section: Restriction Of Career Options and Workplace Discriminationmentioning

confidence: 99%

Subjects with colour vision deficiency in the community: what do primary care physicians need to know?

2014

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Background: Congenital colour vision deficiency (CVD) has a prevalence of 8% for men and 0.4% for women. Amongst people born with normal colour vision, the acquired form of CVD can also affect them at later stages of their lives due to disease or exposure to toxin. Most CVD persons have difficulties dealing with colours in everyday life and at work, but these problems are under-reported due to a lack of its awareness in the general population. This literature review seeks to present findings of studies and reports on the impact of CVD on the affected persons chronologically through different stages of their lives and their coping measures. Methods: Scientific publications and corresponding references relating to how CVD affects individuals were searched, identified and retrieved from PubMed, National University of Singapore and Cochrane electronic databases. Books that were not available electronically were manually searched. Paramedical literature was also included through online searches using Google and Google Scholar. Inclusion criteria were English-based studies pertaining to effects of CVD on everyday life and respective coping measures, including experimental, observational studies, symposium proceedings and systematic review. There was no timeframe restriction for these publications. Articles using anecdotal evidence were excluded with the exception of those used to describe the effects of CVD on play age and school age. Our literature search found 136 articles, 60 of which were used in this review based on the respective selection criteria. Results: CVD affects many aspects of life from childhood to adulthood. The implications extend across play, sports, driving, education, occupation, discrimination, and health and safety issues. Awareness of CVD helps to identify and develop corresponding coping strategies. Conclusions: More work needs to be done in raising awareness of CVD and its implications, as well as implementing measures to overcome these difficulties.

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Section: Restriction Of Career Options and Workplace Discriminationmentioning

confidence: 99%

Subjects with colour vision deficiency in the community: what do primary care physicians need to know?

2014

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“…signal colors, wires, systemic medications), and our work demonstrates that topical ophthalmic medication bottle cap recognition may also be impaired. 30–33 Miscommunication between patients and providers may foster confusion, resulting in inaccurate and potentially harmful changes in treatment regimens, and ultimately worsen health outcomes. Given the poor accuracy, reliability, and specificity of the current system, it is vital that changes are considered and introduced, though significant barriers exist that may hinder systemic change.…”

Section: Discussionmentioning

confidence: 99%

Ability of Bottle Cap Color to Facilitate Accurate Patient–Physician Communication Regarding Medication Identity in Patients with Glaucoma

et al. 2015

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Objective To determine the accuracy of patient-physician communication regarding topical ophthalmic medication use based on bottle cap color, particularly amongst individuals who may have acquired color vision deficiency from glaucoma. Design Cross-sectional, clinical study. Participants Patients ≥ 18 years old with primary open-angle, primary angle-closure, pseudoexfoliation, or pigment dispersion glaucoma, bilateral visual acuity of 20/400 or better, and no concurrent conditions that may affect color vision. Methods One hundred patients provided color descriptions of 11 distinct medication bottle caps. Patient-produced color descriptors were then presented to three physicians. Each physician matched each color descriptor to the medication they thought the descriptor was describing. Main Outcome Measures Frequency of patient-physician agreement, occurring when all three physicians accurately matched the patient-produced color descriptor to the correct medication. Multivariate regression models evaluated whether patient-physician agreement decreased with degree of better-eye visual field (VF) damage, color descriptor heterogeneity, and/or color vision deficiency, as determined by Hardy-Rand-Rittler (HRR) score and the Lanthony D15 testing index (D15 CCI). Results Subjects had a mean age of 69 (±11) years, with mean VF mean deviation of −4.7 (±6.0) and −10.9 (±8.4) dB in the better- and worse-seeing eyes, respectively. Patients produced 102 unique color descriptors to describe the colors of the 11 tested bottle caps. Among individual patients, the mean number of medications demonstrating patient-physician agreement was 6.1/11 (55.5%). Agreement was less than 15% for 4 medications (prednisolone acetate [generic], betaxolol HCl [Betoptic], brinzolamide/brimonidine [Simbrinza], and latanoprost [Xalatan]). Lower HRR scores and higher D15 CCI (both indicating worse color vision) were associated with greater VF damage (p<0.001). Extent of color vision deficiency and color descriptor heterogeneity were the only significant predictors of patient-physician agreement in multivariate models (odds of agreement = 0.90 per 1 point decrement in HRR score, p<0.001; odds of agreement = 0.30 for medications exhibiting high heterogeneity [≥ 11 descriptors], p=0.007). Conclusions Physician understanding of patient medication usage based solely on bottle cap color is frequently incorrect, particularly in glaucoma patients who may have color vision deficiency. Errors based on communication using bottle cap color alone may be common and could lead to confusion and harm.

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“…The CN Lantern is designed to simulate railway signal lights used to control train movement ( 7 ). There are 13 triplets of tests lights presented and the color of the individual lights in a triplet can be any combination of red, green, or yellow.…”

Section: Case Reportmentioning

confidence: 99%