Diffuse unilateral subacute neuroretinitis: Report of a case from the Indian subcontinent and the importance of immediate photocoagulation

Purpose: To report a case of DUSN from the Indian subcontinent and emphasize the importance of immediate photocoagulation. Method: Review of case record. Result: The referring ophthalmologist had photographed the subretinal worm but had not undertaken laser photocoagulation. On presentation to us the patient had features typical of DUSN but no worm could be detected despite repeated examinations. Failure to localize the worm at subsequent examinations resulted in only partial recovery of vision. Conclusion: Whenever the nematode is detected, immediate laser photocoagulation of the worm is necessary as the migratory worm may be difficult to identify later on. This is necessary to prevent the otherwise natural decline in vision. © Springer Science+Business Media, Inc. 2007.