The purpose of this thesis was to ·determine if a visual examination using modified subjective tests would be more applicable to intellectually disadvantaged individuals who cannot respond to conventional means of subjective testing. An investigation was designed to determine if a modified subjective testing sequence combined with a home training program could be used to communicate clearly and effectively so that intellectually disadvantaged individuals could render more reliable subjective responses. Fourteen subjects were obtained to participate in the investigation. It was concluded that the modified subjective examination allowed the intellectually disadvantaged individuals to make better subjective judgements and more reliable responses, the data of which could be used together with objective findings to arrive at a more functionally acceptable compensation for refractive error.
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