[Invisible Cataract]

To report two cases of oil-drop cataract the description of this entity. Two women [one 46 and the other 56 years old] presented with gradual visual loss. Previous studies including CT scan, MRI, VEP and ERG were normal. With the use of simple diagnostic tests including a multiple pinhole occluder and use of visuscope, a diagnosis of oil-drop cataract was made in both cases. In cases with progressive visual acuity loss without definite etiology, negative RAPD and normal color vision, oil-drop cataract should be considered as a possibility. Visuscope and multiple pinholes are effective methods for confirming the diagnosis