Mydriasis surgery. 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
The Widening Gyre (album) of their new album to be released in Ireland on 20 February 2015, in the UK on 23 February 2015 and in the US on 24 February 2015. And as they borrowed the title from "The Second Coming", one of W. B. Yeats poems, the first Irishman to be awarded the Nobel Prize for Literature in 1923. Altan's official website published a presentation of their new studio album "The Widening Gyre" giving many details about the new album: the new musical direction taken by the band, the album recording process and the participation of numerous guest musicians as well as