A high index of suspicion of polymicrobial keratitis should be made in patients with multiple and systemic risk factors. Contact lens usage was the most common risk factor in both groups. Size of corneal infiltrate is a fairly reliable indicator for suspecting polymicrobial keratitis. Prolonged course of the disease and decreased antibiotic sensitivity were the other notable features of polymicrobial keratitis.

Use of cosmetic contact lenses and buying them online is a fairly common practice among teenagers. This can lead to serious eye infection as in this case. To our knowledge, this is the first report of contact lens-related keratitis simultaneously involving these two rare organisms.

Herein, we report another case of arteritic anterior ischaemic optic neuropathy from Singapore, in which the initial optic disc swelling was extreme and the sequential disease resolved because the patient was already on maximum treatment. As the management of this biopsy-proven giant cell arteritis case was complicated by the presence of a number of other medical conditions, including end-stage renal failure, monitoring of the response to treatment proved problematic.Keywords: arteritic anterior ischaemic optic neuropathy, corticosteroid treatment management, second eye involvement, temporal artery biopsy C a s e R e p o r t e37