Mydriasis disorders e.g. epilepsy, stroke, and impending brain herniation are known to lead to temporal mydriasis as well. A brain catastrophe, or a rapidly increasing brain mass, can cause compression of the oculomotor nerve. In cases of head injury or orbit trauma (eye injury), the iris sphincter (the muscle responsible for closing the pupil) or the nerves controlling it can be damaged, reducing or eliminating the normal pupillary light reflex. A mydriatic is an agent that induces dilation of the pupil. Drugs such as tropicamide are used in medicine to permit examination of the retina and other deep structures of the
The Widening Gyre (album) the titles of some of the new tracks. The very same day, on their "Widening Gyre" iTunes page, Altan revealed the titles of the 14 tracks from their new studio album and released them for sale. On 27 January 2015, on their "Widening Gyre" Compass Records page, Altan made available short snippets of their new tracks. Mairéad Ní Mhaonaigh introduced the music on the album as an exploration of the influence of Appalachian music on Irish music. Recorded «with many good friends in the studio and Compass Records co-founder Garry West in the producer's chair steer[ing] the band in the