Individuals with corrected presbyopia adapt their smartphone reading behavior by using larger font sizes, greater viewing distances, and more time to complete reading tasks compared with non-presbyopes, according to a study.
In the study, participants completed standardized reading tasks on a smartphone under habitual viewing conditions. Researchers assessed reading time, viewing distance, and craniovertebral angle to evaluate visual behavior and posture.
Presbyopes used significantly larger font sizes than non-presbyopes (P < 0.01) and read at significantly greater distances (P < 0.001). They also required significantly more time to complete the tasks (P < 0.001).
Craniovertebral angles were similar between groups (P > 0.05), which the researchers noted indicated no significant difference in neck posture during smartphone use.
Reference
Abraham CH, Osman A, Sakyi-Badu G, et al. Smartphone Near-Viewing Demands Differ in Corrected Presbyopes: Implication for Presbyopic Correction. Ophthalmic Physiol Opt. 2026;doi: 10.1007/s44402-026-00168-3. Epub ahead of print. PMID: 42584526.
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