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THE ELECTRORETINOGRAM IN CONGENITAL CATARACT
Author(s) -
ZETTERSTRÖM B.
Publication year - 1974
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1974.tb00386.x
Subject(s) - medicine , visual acuity , erg , ophthalmology , electroretinography , surgery , retinal
A total of 114 eyes affected with congenital cataract were examined by electroretinography prior to surgery. The preoperative electroretinogram (ERG) of 91 eyes was normal, of 17 eyes subnormal and in six eyes it was unrecordable. There was a clear‐cut relationship between a subnormal preoperative ERG and a poor postoperative visual acuity: of the 17 eyes of which the preoperative ERG was subnormal, the postoperative visual acuity of 12 eyes was < 0.1 and of the remaining eyes 0.1–0.2. In the cases in which the preoperative ERG is unrecordable, the chance of restoring a good postoperative visual acuity by surgery is very small. The visual acuity of the six eyes in this series from which the preoperative ERG was unrecordable, was < 0.1. The therapeutic possibilities of surgery cannot invariably be conclusively assessed from the normal preoperative ERG because the latter does not reflect possibly coexisting macular lesions or lesions proximal to the retina. Nevertheless, in cases in which the preoperative ERG is normal, the chance of achieving good therapeutic results with surgery is greater; out of 91 eyes in this series from which a normal preoperative ERG was recorded, the postoperative visual acuity of 10 eyes was < 0.1, of 36 eyes, 0.1–0.2 and of 45 eyes, 0.3 or more.