Swelling of the feet and ankles can occur as a result of conditions involving the local extremities as well as systemic conditions (diseases and conditions that affect the entire body). Localized processes such as injuries and infections may lead to a swollen foot and/or ankle only on the involved side. Swelling of the ankle on one side is often a result of sprains or strains.
Trauma. A dilated pupil may be caused by any kind of trauma such as a damage of the nerves controlling the activities of the iris, an injury to the head or the eye, and iris sphincter. All these factors highly affect the consensual reactivity of the eyes to light and cause fixed and dilated pupils after trauma.ervous Problems. The neuropathic cause behind dilation of the pupils is the sympathetic stimulation of Î±1 adrenergic receptors involving the radial muscle and the parasympathetic stimulation involving the circular iris muscle cause the pupils to dilate.
What are some causes of an abnormally large (dilated or mydriatic) pupil? After trauma to the eye, the iris tissue can be injured causing the pupil to not constrict to bright light normally. Another possible cause is Adieâs tonic pupil syndrome. This is a condition most common in young adult females, which usually begins in one eye. The pupil is sluggish to react to light.