by Aaron Wolfe, MD & David Effron, MD on March 6, 2014
..."Many patients present with eye symptoms (pain and blurred vision) rather than symptoms of their underlying infection; this was true of half of the patients in one study (5). Common symptoms include headache, eye pain, photophobia, vision loss, and ocular discharge. Other symptoms include conjunctival/scleral injection, chemosis, hypopyon and uveitis. The majority of patients with endogenous bacterial endophthalmitis are initially misdiagnosed and many have an underlying disease which predisposes them to infection such as endocarditis, urinary tract infections, abdominal abscesses, and meningitis. Patients may be misdiagnosed due to the fact that early presentation appears similar to orbital cellulitis or anterior uveitis, which are both more commonly seen than endopthalmitis..."
http://www.epmonthly.com/www.epmonthly.com/departments/clinical-skills/visual-dx/endogenous-endophthalmitis/