A family of squints: the differing effects of hypermetropia on four siblings.

Four siblings in a family of five were found to be affected with hypermetropia in differing degrees and with differing effects. These were unilateral hypermetropia, producing amblyopia; hypermetropia inducing an accommodative esotropia with minimal amblyopia and fully controlled with glasses; hypermetropia producing an accommodative esotropia with a high AC/A ratio, fully controlled with bifocals; and hypermetropia producing esotropia which was only partially corrected with glasses, therefore partially accommodative, with a residual squint which required surgery. This family of four nicely demonstrates all the permutations and combinations possible in accommodative-type esotropia and the pitfalls therein.