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Published online by Cambridge University Press: 01 August 2014
An oculistic and orthoptic screening has been carried out on a sample of 122 twins aged 6 to 10 years (31 MZ male and 30 MZ female pairs). A few remarks could be made, concerning both twins as such and the heritability of the traits under examination. The twins appear to differ from the general population of singletons of the same age on account of a lower frequency of ametropia and strabismus as well as of a high frequency of epicanthus.