In 1993-1995 the authors prescribed in the Institute for the Treatment of Ophthalmological Defects and at the Second Ophthalmological Clinic in Prague special optic aids for 795 patients. The patients were divided by age into three groups. In the group under 18 years the main cause of the defect was atrophy of optic nerve, in the group between 18 and 60 years tapetoretinal degeneration and in the group over 60 year senile macular degeneration. Most frequently a magnifying glass was prescribed (36.16%), a prismatic monocular in 31.30%, a hyperocular in 27.46% and telescopic spectacles in 5.08%.