Largest font possible, 18 points for vision loss Guidelines for legibility of prescription labelling General guidelines for print accessibility For example, in Ontario, there are no legal requirements regarding the legibility of print, although the content of what must be included on the label is specified. 11Īlthough there are guidelines for general print legibility from nongovernmental organizations (NGOs) and specifically for medication labels from some pharmaceutical and health organizations ( Table 1), they may not be applied consistently to medication labels. 7 - 9 An increase in the number of medications used is associated with increased medication mistakes 10 and decreased medication recall. 6 Additionally, older adults are at increased risk for medication mistakes because they take more medications than younger persons. 5, 6 Poor vision may also result in increased anxiety about taking medications and increased dependence on others for medication management.
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4 All these factors may affect the reading of print, as medicine labels may lose their contrast with time, and lighting in an individual’s home may be less than optimal.Īs a result, the legibility of medication labelling is indeed a concern, as poor or illegible labelling together with poor vision may lead to misunderstandings of how to take medication. 3 The speed of reading is substantially slower in older adults and even among those who still have good high-contrast acuity. 3 Contrast sensitivity and visual acuity for low contrast in low light are 6 times worse. While high-contrast visual acuity is 2 times poorer in those aged 90 or older compared with younger adults, low-contrast acuity is nearly 4 times poorer. Other measures of vision (besides visual acuity) are affected by aging in the absence of ocular disease. 2 These percentages rise to 9.8% of 75- to 84-year-olds and 18% of those 85 years and older, respectively. 2 estimated that 0.7% of the total population had visual impairment visual acuity less than 6/12, which means that the minimum size of letters that they can recognize is twice that which a person with normal vision can recognize) and 0.24% are legally blind (6/60 or less-the minimum size of letters that they can recognize is 10 times that which a person with normal vision can recognize). The 2006 Statistics Canada Participation and Activity Limitations Survey (PALS) identified 816,250 Canadians aged 15 years and over as having a self-reported vision difficulty. The total number of people at risk of visual impairment in Canada is high and increases sharply with age. In that regard, one area that has received little attention is the legibility of medication labels.
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This includes making sure patients understand their medications and how to take them.
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Patient-centred care is a professional obligation to take responsibility for an individual patient’s needs.