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 (novel) The Widening Gyre (novel) The Widening Gyre is a 1983 novel by Robert B. Parker, featuring his private detective character Spenser. The title comes from the first line of W.B. Yeats poem "The Second Coming". Spenser is hired to head up the security detail for Congressman Meade Alexander as he runs for the Senate. The congressman confides to Spenser that he is being blackmailed by someone who wants him to drop out of the senate race. The congressman's wife Ronni drinks too much and there is an explicit sex tape of her and a much younger man. Spenser's assignment is