Eight patients (four men, four women), with low visual acuity caused b
y autosomal dominant cystoid macular dystrophy, were treated daily wit
h oral 250 mg dose acetazolamide. Treatment ranged from two to 17 mont
hs. None of these eight patients had improvement of visual acuity of m
ore than 0. 1. Conclusion: Treatment with 250 mg acetazolamide appears
not to be an effective therapy for cystoid macular oedema in dominant
cystoid macular dystrophy. The electroretinography b-wave/a-wave rati
o was normal. The primary lesion in dominant cystoid macular dystrophy
remains obscure.