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Systemic retinoids are among the most prescribed drugs in dermatology, thanks to their activity as proliferation modulators and keratinisation normalisers. Common side effects such as blood lipid disorders, xerosis and photosensitivity are well established and usually dose dependent. Conversely, retinoid-associated ocular disturbances have been reported, yet with differences in terms of frequency and manifestations As data regarding a potential correlation with refractive errors are heterogenous and have not been previously thoroughly addressed, we performed a systematic review of the literature with the aim of comprehensively evaluating the current evidence regarding retinoid-associated myopia in dermatologic patients. A systematic review of the literature was carried out according to the PRISMA guidelines. A search on MEDLINE, Pubmed, Scopus, Cochrane Library was conducted using the MeSH terms: retinoid, isotretinoin, acitretin, bexarotene, etretinate, alitretinoin, myopia, refractive errors, via the Boolean term AND. Only manuscripts in English were considered, there was no restriction on type of article. Animal research and in vitro studies were excluded. Six articles were finally included in this systematic review. One well designed prospective study was able to show a slight myopic shift in the first six months, but id did not evaluate further development of the refractive error nor the effects of drug discontinuation. Another prospective study, with a smaller sample size showed no myopic progression at 12 months. Two case reports showed a myopic shift after two weeks from therapy start. Another case report showed a myopic shift associated with narrowing of the anterior chamber after one week from therapy start. Finally a large retrospective study based on spontaneous reporting systems and world’s literature classified myopia as a certain side effect. Considering the current literature, it is not possible to define a clear correlation between the use of retinoids and the development or worsening of myopia. Some studies suggest that retinoids may cause a myopic shift and the pathophysiologyical mechanism is supported by some animal and in vitro studies, but there is a lack of large prospective and well-controlled studies. In case of ocular disturbances after retinoid use a prompt ophthalmological referral is advisable and in case of the detection of a myopic refractive error a relationship to retinoids should be ruled out, considering also other possible causes such as age and previous refractive status.

Retinoid-associated myopia in dermatologic patients: a systematic review