In 2012, Canadian researchers published a case-control study in which use of oral fluoroquinolones was associated with an increased risk of retinal detachment.1 Although the relative risk was impressive (adjusted rate ratio, 4.5), the absolute risk was quite low (estimated at 1 excess case/2500 quinolone users/year). The study was conducted because several case reports had suggested a link between quinolones and retinal detachment, and because a possible causal mechanism existed: fluoroquinolones may have a deleterious effect on connective tissue (thus explaining their association with tendon rupture2), and connective tissue plays a role in the integrity of ocular structures, including the retina.
Brett AS. Oral Fluoroquinolone Use and Retinal Detachment: Reconciling Conflicting Findings in Observational Research. JAMA. 2013;310(20):2151–2153. doi:10.1001/jama.2013.280501
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