TY - JOUR
T1 - Early Detection of Central Visual Function Decline in Cone-Rod Dystrophy by the Use of Macular Focal Cone Electroretinogram
AU - Galli-Resta, Lucia
AU - Piccardi, Marco
AU - Ziccardi, Lucia
AU - Fadda, Antonello
AU - Minnella, Angelo Maria
AU - Marangoni, Dario
AU - Placidi, Giorgio
AU - Resta, Giovanni
AU - Falsini, Benedetto
PY - 2013
Y1 - 2013
N2 - PURPOSE. To evaluate macular focal cone ERG (fERG) as a tool for reliable and early detection of central retinal function decay in cone-rod dystrophy (CRD). METHODS. A retrospective study of the time course of fERG amplitude and its relation to visual acuity alterations was performed in 47 CRD patients followed yearly for 6.0 +/- 3.1 years. Macular focal cone ERG was evoked by a flickering uniform red field overlaying the central 188 of visual field. RESULTS. Macular focal cone ERG follow-up allowed a clear-cut identification of CRD patients as stationary or progressive, in agreement with visual acuity follow-up. In all progressive patients, fERG declined whenever visual acuity declined, and-in 50% of the cases-fERG loss anticipated acuity loss of several years. CONCLUSIONS. Macular focal cone ERG represents a sensitive assay to detect, categorize, and follow the progression of central retinal dysfunction in CRD. Its use as a diagnostic tool in CRD may help anticipate, for an individual patient, the likelihood and rate of further disease progression before visual acuity loss has occurred.
AB - PURPOSE. To evaluate macular focal cone ERG (fERG) as a tool for reliable and early detection of central retinal function decay in cone-rod dystrophy (CRD). METHODS. A retrospective study of the time course of fERG amplitude and its relation to visual acuity alterations was performed in 47 CRD patients followed yearly for 6.0 +/- 3.1 years. Macular focal cone ERG was evoked by a flickering uniform red field overlaying the central 188 of visual field. RESULTS. Macular focal cone ERG follow-up allowed a clear-cut identification of CRD patients as stationary or progressive, in agreement with visual acuity follow-up. In all progressive patients, fERG declined whenever visual acuity declined, and-in 50% of the cases-fERG loss anticipated acuity loss of several years. CONCLUSIONS. Macular focal cone ERG represents a sensitive assay to detect, categorize, and follow the progression of central retinal dysfunction in CRD. Its use as a diagnostic tool in CRD may help anticipate, for an individual patient, the likelihood and rate of further disease progression before visual acuity loss has occurred.
KW - cone–rod dystrophy, focal ERG, visual acuity
KW - cone–rod dystrophy, focal ERG, visual acuity
UR - http://hdl.handle.net/10807/53728
U2 - 10.1167/iovs.13-12676
DO - 10.1167/iovs.13-12676
M3 - Article
SN - 0146-0404
VL - 54
SP - 6560
EP - 6569
JO - INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
JF - INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
ER -