[The comparison of two methods to predict the post-operative visual acuity of cataractous patients].

To study the accurate methods to predict the post-operative visual acuity of cataractous patients with different degrees of opaque lenses.Visual electrophysiological methods and retinometer were used to evaluate the visual function after phacoemulsification and intraocular lens implantation in 152 cases (152 eyes). The regressive analyses between the post-operative best corrected visual acuity (BCVA) and each of the following results: the pre-operative flash electroretinogram (F-ERG), flash visual evoked potentials (F-VEP) and potential visual acuity (PVA) were performed, respectively.More obvious linear-relationship was shown between PVA and BCVA (r = 0.654) than that between the combination of b wave's amplitude of F-ERG with wave's amplitude of F-VEP and BCVA (r = 0.528) in the patients with partial opaque lenses. Obvious linear-relationship between the combination of the F-ERG with F-VEP values and BCVA (r = 0.487) and no obvious relationship between the potential visual acuity and BCVA (r = 0.049) were shown in the patients with near complete/complete opaque lenses.Both visual electrophysiological and retinometric detection, especially the latter one, can predict the post-operative visual acuity of the patients with partial opaque lenses accurately. Visual electrophysiological detection can predict the post-operative visual acuity of cataractous patients with near complete/complete opaque lenses accurately but retinometric detection can not.