Zero defect is desirable but on occasion it is hard to accomplish in our dailylives.
In medicine once it happens, it can raise a social problem. Authors directed their attentionsto an inadverdent visual disturbance caused by the paranasal sinusitis operations. Tostudy this problem, quetionnaires to Eye and ENT departments of the University Hospitals an d t he majorhospitals in nation. Obtained responses were analized.
1) Fifty-three cases of the visual disturbance were accumulated in total. Witha ccordance to their severeness, they were grouped into 3 groups; severe (total blind ness to handmovements) 66%, moderate (finger-counting to 0.1 in visual acuity) 22.6%, and mild (better than 0.1 in visual acuity) 11.3%. Eighty four percent o f the cases fell in age bracket of 10 to 30 years old. Male to female ratio was 2.4; 1 an dmales were dominant. From these figures it can be said that the visual disturb an eoccures more often in you ngmale.
2) Rate of this complication in a particular institution was analized stati stically. One such event is expected to occure during 19.2 years period. Supposeasur geonoperate