BACKGROUND: In case of @entity227 without morphologic pathology differentiation between a functional @entity227 and a @entity989 may be difficult. @entity1 AND METHODS: We report on two @entity1 , aged 33 and 44, who were complaining of a progressive @entity227 occurring over the past several weeks to months. They were referred to our department with the presumed diagnosis of functional @entity227 . Biomicroscopy of the anterior and posterior segments, perimetry (Goldmann), colour ( @entity10832 -Hue-Test) and stereopsis testing (Lang-Stereotest), @entity941 angiography (FLAG) and electrophysiological testing (P-ERG, VECP, EOG, multifocal electroretinography [mfERG]) were performed. RESULTS: Visual acuity was 0.16 OU and 0.25 OU respectively. A small relative central @entity1019 (I/1) was detected by dynamic perimetry. Colour vision, random-dot stereopsis and the results of electrophysiological testing except multifocal electroretinography (mfERG) were normal. The mfERG was able to detect a cone dysfunction which was related to the fovea. CONCLUSION: In case of @entity227 of unknown etiology electrophysiological testing is indicated. The mfERG as an objective diagnostic method is able to detect a foveal @entity6121 .

[Foveal XXXX : diagnostic ranking of the multifocal electroretinogram].

@entity1 :: ('9606', 'Species') :: ['women', 'PATIENTS'] @entity227 :: ('MESH:D014786', 'Disease') :: ['visual loss'] @entity10832 :: ('MESH:C035049', 'Chemical') :: ['FM-100'] @entity6121 :: ('MESH:C566719', 'Disease') :: ['cone dystrophy'] @entity941 :: ('MESH:D019793', 'Chemical') :: ['fluorescein'] @entity989 :: ('MESH:D012164', 'Disease') :: ['retinal disorder'] @entity1019 :: ('MESH:D012607', 'Disease') :: ['scotoma']
@entity6121 :: (MESH:C566719,Disease) :: ['cone dystrophy']
