infacility of accommodation

A condition characterized by difficulty or sluggishness in changing the accommodative response from one viewing distance to another. It involves the accommodative system’s ability to rapidly increase or relax ciliary muscle contraction to adjust focus. Infacility can affect both increasing accommodation for near vision and relaxing accommodation to focus at distance. It is often associated with aging and reduced amplitude of accommodation, causing symptoms like blurred vision, eye strain, and headaches when changing focus between distances.