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Frail elderly are likely to be functionally impaired and have comorbid conditions such as reduced mobility and delirium.5 Frailty is also a risk factor for falls and even for death.6 Some prescription medications have also been linked to falls.7 My personal view is that visual difficulties, many of which are correctable, do not receive enough attention in research on risk factors for falls, particularly in studies of prescription medicines. [...]of an acknowledged error by the contractor, the rise on one step was 2 inches higher than on all of the other seven. [...]a useful overview of the factors underpinning age-related visual decline appears in an article by Andersen.17 When studying falls, it is essential to specify the environmental conditions and the frequency of falls in order to establish that the cohorts compared are indeed comparable. Having diabetes mellitus is also a risk factor for falls in the elderly.24–26 Falls in patients with diabetes are likely related to complications such as diabetic neuropathy, diabetic retinopathy, hypoglycemia, or orthostatic hypotension.27 In a study by Sumantri et al,28 metformin was found to have a protective effect against frailty in elderly patients with diabetes.