Effect of maternal rubella on hearing and vision: a twenty year post-epidemic study.

Three years of research conducted at NTID beginning in 1984 examined the hearing and vision characteristics of two groups of deaf college students. All 242 students studied received complete audiometric assessments and ophthalmological examinations. Of those students examined, 104 were known to be deaf as a result of maternal rubella (congenital rubella syndrome (CRS) group). The remaining 138 (non-CRS group) became deaf for a variety of other reasons. No significant differences were found between groups in puretone thresholds for frequencies measured at octave intervals from 250 thru 8000 Hz. There were, however, significant differences between the two groups relative to their vision characteristics. Seven visual pathologies or resulting conditions were found to be more prevalent with the CRS population. Among them were 38 cases of amblyopia which might have been prevented with early intervention. The various implications of this problem are discussed.