Impact of cataract on critical flicker fusion frequency: A hospital based study

Purpose: To know whether cataract alters critical flicker fusion frequency. Design: A hospital based observational study. Materials and Methods: There were 113 patients with immature cataract fundus view are studied. Pre and post operatively critical flicker fusion frequency (CFFF) test conducted and frequency values noted. All patients were recorded of vision, relative afferent pupillary defect (RAPD), intraocular pressure and dilated fundus findings. Any abnormal fundus, glaucoma and RAPD were excluded. Results: CFFF values taken for analysis. There was no change in CFFF values post operatively. Those who had higher CFFF values remained higher postoperatively also. And similarly remained low those with lower CFFF values. There was no statistical significance (p-value=0.2182). Conclusion: Cataract did not alter the CFFF. High or low CFFF values can be concluded as dependant on optic nerve and retinal health status.