Impact of Glasses for Vision Problems on Cognitive Function in Rural Older Adults

Inclusion Criteria: * Older adults who meet all of the following criteria will be eligible to participate in this study: * Registered as a rural resident (holding rural household registration); * Age from 60 to 79 years at the time of enumeration; * Resident in the household for \> = 3 months and planning to reside in the local area for the trial duration; * Distance vision impairment (VI, presenting visual acuity \[VA\] \< 6/18 in the better-seeing eye and improving to \> = 6/18 with spectacles) and/or near VI (presenting near vision \< N6 at 40 cm and improving to \> = N6 with spectacles); * Independent mobility with or without the support of a walking stick; * Chinese version of the Mini-Mental State Examination (C-MMSE) score above the following cut-offs (out of 30): \>17 for illiterate participants, \>20 for those with primary school education, \>22 for those with junior high school education, and \>23 for those with high school education or above. * Willingness to participate, to be randomized to either study group, and to adhere to the protocol Exclusion Criteria: * Presence of glaucoma or visually significant cataract, or a history of surgical treatment for these or other major ocular conditions; * Consistent use of prescription spectacles and/or hearing aids; * Serious medical illness likely to result in loss to follow-up. Those less severely affected by conditions such as hypertension and/or diabetes will be eligible; * Failure on the whispered voi…