adaptation aged blindness chezlapersonneâgée congrès congrés disabledpersons healthandhygiene low maladies ocular oeil olderblindpeople psychological psychologicalaspects rehabilitation servicesfor socialwork socialworkwitholderpeople socialworkwithpeoplewithdisabilities troublesdela unitedstates vision visiondisorders visiondisordersinoldage ww140v8311991