Assessment of Visual Acuity and Clinical Outcomes in Patients with Glaucoma, Retinal Disease and Cataract

Background: Glaucoma, retinal diseases and cataract are major causes of visual impairment and blindness worldwide. Although these conditions affect different anatomical structures of the eye, they may produce overlapping symptoms and substantial limitations in daily functioning. Accurate assessment of visual acuity, structural abnormalities and disease-specific visual function is essential for diagnosis, treatment planning and monitoring clinical outcomes. Objective: To review the methods used to assess visual acuity and visual function in patients with glaucoma, retinal diseases and cataract, and to discuss clinical outcomes associated with current management strategies. Methods: This narrative review summarizes established ophthalmic guidance and published literature concerning visual acuity assessment, diagnostic investigations, treatment approaches and clinical outcomes in the three disease groups. It focuses on routine clinical assessment and the limitations of visual acuity as a single measure of visual function. Discussion: Visual acuity provides an important measure of central visual resolution but does not adequately represent every aspect of visual function. In glaucoma, visual-field testing and optic nerve assessment are essential for identifying functional deterioration. Retinal diseases require evaluation of retinal structure and function, often supported by optical coherence tomography and fundus imaging. Cataract assessment includes visual acuity measurement, lens examination and consideration of glare, contrast sensitivity and functional limitations. Treatment outcomes depend on disease severity, timing of intervention, associated ocular conditions and appropriate follow-up. Conclusion: A comprehensive approach combining visual acuity measurement with disease-specific structural and functional investigations provides a more reliable assessment of ocular health and clinical outcomes than visual acuity alone.