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Investigation of the use of the CAMCOG in the visually impaired elderly
1Health Care of the Elderly, Queen's Medical Centre, Nottingham, UK.
Objective:
To determine the effect of decreased visual acuity due to cataract on tests of cognitive function in the elderly.
Method:
Patients at a precataract surgery assessment clinic were screened to exclude cognitive impairment. The CAMCOG was completed by 42 subjects, and the visual acuity for each eye assessed.
Results:
There was a significant correlation between visual acuity and the CAMCOG score, which was abolished when simple modifications were made to the CAMCOG. Although 5 subjects scored below the cut-off point, 3 with worse visual acuity scored within the cut-off.
Conclusions:
Visual impairment has a significant effect on the scoring of the CAMCOG. However, the effect may not only be due to decreased visual acuity but also to other factors such as contrast sensitivity, which may be affected by cataract.
