<P> Periorbital cellulitis must be differentiated from orbital cellulitis, which is an emergency and requires intravenous (IV) antibiotics . In contrast to orbital cellulitis, patients with periorbital cellulitis do not have bulging of the eye (proptosis), limited eye movement (ophthalmoplegia), pain on eye movement, or loss of vision . If any of these features is present, one must assume that the patient has orbital cellulitis and begin treatment with IV antibiotics . CT scan may be done to delineate the extension of the infection . </P> <P> Affected individuals may experience the following; swelling, redness, discharge, pain, shut eye, conjunctival infection, fever (mild), slightly blurred vision, teary eyes, and some reduction in vision . </P> <P> Typical signs include periorbital erythema, induration, tenderness and warmth . </P> <P> Staphylococcus aureus, Streptococcus pneumoniae, other streptococci, and anaerobes are the most common causes, depending on the origin of the infection . </P>

Preseptal cellulitis of left upper eyelid icd 10