Mydriasis Mydriasis Mydriasis () is the dilation of the pupil, usually having a non-physiological cause, or sometimes a physiological pupillary response. Non-physiological causes of mydriasis include disease, trauma, or the use of drugs. Normally, as part of the pupillary light reflex, the pupil dilates in the dark and constricts in the light to respectively improve vividity at night and to protect the retina from sunlight damage during the day. A "mydriatic" pupil will remain excessively large even in a bright environment. The excitation of the radial fibres of the iris which increases the pupillary aperture is referred to as a mydriasis.
The Widening Gyre (album) get their teeth into", describing "The Widening Gyre" as "an absolute treasure trove" and Ní Mhaonaigh's voice as "indescribably beautiful", "songs [occupying] a special place on any Altan album", adding: "Ní Mhaonaigh's soaring, soul-stirring vocals on "Far Beyond Carrickfinn" [...] is one of the most touching things you'll hear this year". The Telegraph gave it 4 stars (out of 5), describing it as "a wonderful mix of Irish and Appalachian music." On 9 March 2015, "The Widening Gyre" was honoured "album of the week" on RTÉ radio 1. PopMatters's gave it a rating of 8 stars out of 10. Music