{"doi":"10.1093/gerona/glab103","title":"Visual Impairment and Objectively Measured Physical Activity in Middle-Aged and Older Adults","abstract":"BACKGROUND: Vision loss is associated with increased risk of falls and restricted physical activity, yet the relationship between multiple vision measures and objectively measured physical activity, especially activity patterns, in mid-to-late life is not well understood. METHOD: This study included 603 participants aged 50 years and older (mean age = 73.5) in the Baltimore Longitudinal Study of Aging who had the following assessments: presenting and best-corrected visual acuity, contrast sensitivity, visual fields, stereo acuity, and free-living physical activity using a wrist-worn ActiGraph accelerometer for 7 days. Linear regression models were used to examine the association between vision measures and daily activity counts, active minutes, and activity fragmentation (defined as an active-to-sedentary transition probability), adjusting for potential confounders. Mixed-effects models estimated differences in activity by time of day comparing those with and without each visual impairment. RESULTS: In the fully adjusted model, worse presenting visual acuity, contrast sensitivity, and visual fields were associated with fewer activity counts, less active time, and more fragmented activity patterns (p < .05 for all). Participants with presenting or best-corrected visual acuity impairment had 19.2 and 29.3 fewer active minutes (p = .05 and p = .03, respectively) per day. Visual field impairment was associated with 268 636 fewer activity counts (p = .02), 46.2 fewer active minutes (p = .02) per day, and 3% greater activity fragmentation (p = .009). Differences in activity levels tended to be greatest from 6 am to 6 pm (p < .05). CONCLUSIONS: Older adults with visual impairment have restricted and more fragmented patterns of daily activity. Longitudinal studies to quantify the long-term impacts of visual impairments on activity decline are warranted.","journal":"The Journals of Gerontology Series A","year":2021,"id":157409,"datarank":0.5926865577872142,"base_score":3.9512437185814275,"endowment":3.9512437185814275,"self_citation_contribution":0.5926865577872142,"citation_network_contribution":0.0,"self_endowment_contribution":0.5926865577872142,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":51,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.8016,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2021-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":264188,"name":"Jennifer A. Schrack","orcid":"0000-0001-9244-9267","position":1,"is_corresponding":false},{"id":490121,"name":"Hang Wang","orcid":"0000-0001-6021-739X","position":2,"is_corresponding":false},{"id":363037,"name":"E Jian‐Yu","orcid":null,"position":3,"is_corresponding":false},{"id":409899,"name":"Amal A. Wanigatunga","orcid":"0000-0002-5763-5184","position":4,"is_corresponding":false},{"id":322316,"name":"Yuri Agrawal","orcid":"0000-0002-5438-1537","position":5,"is_corresponding":false},{"id":381541,"name":"Jacek Urbanek","orcid":"0000-0002-1890-8899","position":6,"is_corresponding":false},{"id":264194,"name":"Eleanor M. Simonsick","orcid":"0000-0002-5460-3494","position":7,"is_corresponding":false},{"id":21956,"name":"Luigi Ferrucci","orcid":"0000-0002-6273-1613","position":8,"is_corresponding":false},{"id":291486,"name":"Bonnielin K. Swenor","orcid":"0000-0002-6044-0951","position":9,"is_corresponding":false},{"id":321098,"name":"Yurun Cai","orcid":"0000-0001-8264-8158","position":0,"is_corresponding":true}],"reference_count":52,"raw_metadata":{"citation_network_status":"fetched"},"created_at":"2026-07-18T23:44:21.786014Z","pmid":"33837407","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}