Ncausas de miosis y midriasis pdf

Congenital miosis american academy of ophthalmology. Miosis or myosis is excessive constriction of the pupil. Crstoday intraoperative miosis in cataract surgery. I just remember it by knowing that mydriasis is a bigger word than miosis, and therefore is when the pupil is very large, as in a dilated pupil. Nonphysiological 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. Unilateral mydriasis after anesthesia cesar lora recibido. When possible intraoperative miosis is identified as a patient risk factor, i prepare for active pupillary management. Normally, as part of the pupillary light reflex, the pupil dilates in the dark and constricts in the light to respectively improve. The term is from ancient greek, muein, to close the eyes. Facebook is showing information to help you better understand the purpose of a page. Injury of parasympathetic innervations causing paralysis of the pupil sphincter may result nonreaction of the pupil to light ray stimuli. Sintoma midriasis definicion y patologias asociadas.

Mydriasis may occur due to either physiologic or nonphysiologic. Pdf a five year old male boy weighing kg who had dental cavities was scheduled for a complete dental treatment. Nonphysiological causes of mydriasis include disease, trauma, or the use of drugs. En muchas intoxicaciones por insecticidas y plaguicidas parathion, etc. Congenital miosis, or microcoria, may represent an absence or malformation of the dilator pupillae muscle. Although intraoperative miosis is unpredictable, some factors such as a history of ablocker use or the occurrence of miosis in the contralateral eye identify patients who are at increased risk of miosis during cataract surgery. The opposite condition, mydriasis, is the dilation of the pupil. Congenital miosis can also occur secondary to contracture of fibrous material on the pupil margin from remnants of the tunica vasculosa lentis or neural crest cell anomalies. Mydriasis is the dilation of the pupil, usually having a nonphysiological cause, or sometimes a physiological pupillary response. Miosis is a smaller word, and therefore is a constricted pupil. Trauma, disease and disorders can cause the nonphysiologic mydriasis and even some drugs can cause mydriasis.