The spectacles are used in:
(A) Progressive glasses for presbyopia (B) Bifocal glasses for presbyopia (C) Bifocals for pediatric pseudophakia (D) Bifocals for adult aphakia
(C) The image shows bifocal glasses of executive type which is especially used in case of paediatric pseudophakia and not in adult aphakia or presbyopia. Other types of bifocals are K or D bifocals which are used for adults with presbyopia Progressive glasses avoid the sudden jump in power in the lenses and provide a smooth transition from the power for distance vision to the power for the near vision thereby providing good distance, intermediate and near vision