More than 200 cases of ocular syphilis have been documented in the United States, International Business Times reports.
The Centers for Disease Control (CDC) found the cases between 2014 and 2016, and it has issued an advisory notice to clinicians.
Ocular syphilis is an inflammatory eye condition that can appear after a syphilis infection, with symptoms including redness in the eyes, blurry vision, and in the worst cases, vision loss.
Syphilis only affects the eye in a small number of cases, but they are increasing in tandem with higher rates of the infection in the U.S. and U.K. Most cases involve HIV-positive men who have sex with other men.
The CDC recommends testing for syphilis for those most at risk, and doctors are urged to be more aware of eyesight complaints from these people. They also urge those who do test positive to seek treatment quickly.
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