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.
What Is a Nation? often adopted the religion and manners, and married the women, of the people they conquered. He notes that France was quite ethnically diverse during the French Revolution. For example, "at the end of one or two generations, the Norman invaders were indistinguishable from the rest of the population". Nonetheless, they had a profound influence, bringing with them "a nobility of military habit, a patriotism" which did not exist before. - Renan then states what has become one of the most famous and enduring ideas of the essay. "Forgetfulness, and I would even say historical error, are essential in the creation