Chloroquine phosphate is widely used for the treatment of chronic autoimune diseases, most commonly rheumatoid arthritis, discoid or disseminated lupus erythematous, light sensitivity eruptions as well as other dermatologic affections. Although the incidence of retinal toxicity by this drug is low even with the maximally recomended dose, its occurrence is relevant because it damages the macula with an important and irreversible visual impairment. A 44-year-old white female patient who had suffered from rheumatoid arthritis for about 19 years had been […]