Optical coherence tomography findings in patients prior to cataract surgery regarded as unremarkable with ophthalmoscopy

Abstract

PURPOSE: To investigate the feasibility and diagnostic benefit of routinely performed preoperative macular spectral-domain (SD-) optical coherence tomography (OCT) for the detection of macular pathology in patients with normal biomicroscopic funduscopy prior to cataract surgery. METHODS: Prospective, single center study. A total of 162 eyes of 123 consecutive patients referred for cataract surgery with a visual acuity better than 20/100, absence of macular symptoms such as metamorphopsia, no history of previous intravitreal procedures and a normal funduscopic appearance on biomicroscopy underwent an additional SD-OCT-examination prior to cataract surgery. OCT-scans were classified in three categories: normal, degenerative vitreous changes without impact on visual outcome or pathological with potential impact on visual outcome. RESULTS: 80 eyes (49.38%) showed normal OCT-scans. 69 eyes (42.59%) were classified as degenerative vitreous changes without impact on visual outcome and 20 eyes (12.35%) as pathological with potential impact on visual outcome. The indication of cataract surgery or the therapeutic strategy remained unchanged in all patients. In patients with pathological alterations further follow-up examinations were recommended. CONCLUSIONS: Routine SD-OCT-imaging of the macular region in patients prior to cataract surgery was feasible to detect macular pathologies in a considerable number of patients, which remained undiagnosed on biomicroscopic funduscopy. Although OCT-findings did not impact therapeutic strategy in this study, preoperative judgement of the expected visual outcome and patient´s informed consent can improve.