THE PREMIERE WEBSITE FOR POLICE NEWS IN TEXAS
SOUND-OFF
LINKS/ EVENTS/ BOOKS/ JOBS/ ARCHIVES & COMMENTS/ TWITTER/ THE BLUE PAGES / BACK ISSUES / WEATHER
ABOUT THE POLICE NEWS /
FACEBOOK / PHOTOS & VIDEOS / Texas Most Wanted
 

HOME PAGE

 

ABOUT US

 SUBSCRIBE HERE
 BUSINESS DIRECTORY
 

AMBER ALERTS

 

EVENTS CALENDAR

 

CONTACT US

 CLASSIFIED ADS
 

EMPLOYMENT

 NATIONAL NIGHT OUT 2013
 

OP/EDs

 SUBSCRIBER CITIES
 

HELPFUL LINKS

 TEXAS MOST WANTED
 

PHOTO GALLERY

 

RECORDED 
INTERVIEWS

 

ARCHIVES

 

P-2-C

 

RECOMMENDED
READING

 

SOUND-OFF

 

YOUR WEATHER

 

Does pupil dilation indicate mental illness?
Aurora, Colo
   
 
More Today's News:
  A determined Linda Tweedie going through therapy, hoping to walk to May 30 fundraiser
  “Chief’s Corner”
  Galveston - Body found near Galveston Seawall
  Galveston - Woman kidnapped, sexually assaulted
  Baytown - Man charged with murder in death of girlfriend's baby
  Dallas - Field Sobriety Training To Resume at Police Academy
  Dallas - Marijuana Distribution Conspiracy iGets Man 17 Years in Federal Prison
  Dallas - Police shoot armed man after half hour chase
  Damon - Brazoria County Fire Chief killed battling fire
  Fort Bend County - Judge hands down probation for Deadly Conduct conviction
  Friendswood - Police Activity Report
  Friendswood - Woman charged in Galveston DUI death arrested again
  Galveston - Houston bicyclist hit by car on San Luis Pass Road
  Galveston - Mayoral Candidate Forums
  Houston - Fatal Traffic Accident
  Houston - Homicide investigating fatal shooting
  Houston - Six Teens, Ages 14-18, Arrested For Burglarizing Home
  Houston - Woman claims she was beaten during arrest
  Hurst - Weekly Crime Information
  LaPorte - Another Rape Aggression Defense course offered by LaPorte PD
  Lewisville - Police Chief's Weekly Update
  Midlothian - Officer hurt in crash succumbs to injuries
  MOST WANTED - Galveston County Sheriff
  MOST WANTED - Harris County Sheriff
  MOST WANTED - Texas City Police
  Nacogdoches - 3 jailed in drug arrests
  Orange - Woman killed in motorcycle accident, daughter injured
  Pet Abuse Case Updates
  Plano - Traffic crash with serious injuries
  Port Bolivar - Investigators hope discovery of murder victim’s vehicle will provide new clues
  Salt Lake City - Defendant Killed by Court Officer in Courtroom
  San Marcos - Armed robbery crime of the week
  Texas - Use Online Driver License Services
  Texas City -Police offering reward if you can help them find missing statue
  Wash. D.C. - EquuSearch sues feds to use drones in searches
  La Marque - City employee charges with theft
  Albuquerque - Police officer fatally shoots car thief
  Boston - Family remembers police officer killed days after bombings
  Brownsville - Judge allows mother of boy shot by police to join suit
  BUSTED & CUFFED - Some that didn't get away

   Next >>
Search Archives:
James Holmes
James Holmes
January 10, 2013

For the first time, police officers on Monday gave a public moment-by-moment account of accused Aurora shooter James Holmes' arrest, as part of a hearing that touched on whether Holmes is mentally fit to stand trial. Officer Jason Oviatt described Holmes as "very relaxed" after the shooting, noting that Holmes had extremely dilated pupils. Are dilated pupils a sign of mental illness?

Not a good one. Dilation of the pupils can reflect not just the lighting conditions in a room but the thoughts and feelings of a person, mentally ill or not. For example, dilated pupils can indicate sexual arousal. Psychologists sometimes study the expansion and contraction of the pupils to find an objective measure of the mind's inner processes, in something called pupillometry. This practice has been used to study everything from racial bias to sexual preference to what happens when the mind puzzles over a difficult math problem.

However, while pupillometry has been used to study aspects of mental illness, including schizophrenia, and while psychologists began observing pupil dilation among the mentally ill more than 100 years ago, pupil dilation on its own is not a good indicator of psychosis or other mental illness. Pupil dilation is regulated by the sympathetic nervous system, the part of the body that controls our fight-or-flight response. So even when psychosis causes changes in pupil dilation, such as by triggering an excited state of fear or anger, the dilation itself is identical to dilation in the non-mentally ill. Moreover, just as with sane people, the pupils return to normal once the state is over.

Dilation of the pupils can also be a side effect of using certain drugs. For example, LSD and mescaline both cause pupil dilation. Some people who suffer from mental illness may find themselves with dilated pupils caused by treatment with prescribed antipsychotic medications.

In the search for more objective, physiological signs of schizophrenia, other aspects of the eyes have also been studied, with mixed results. At least one study purported to find particular groups of facial features, including small eyes and narrow openings between the eyelids, in two subgroups of schizophrenics, but most psychiatrists don't think such findings are useful. Researchers in the United Kingdom recently developed a computer model that could separate out a group of schizophrenics by tracking abnormalities in the movement of their eyes. However, so far the test isn't accurate enough to be used for diagnosis.

Post a comment

Name/Nickname:
(required)

Email Address: (must be a valid address)
(will not be published or shared)

Comments: (plain text only)

Printer Friendly Format  Printer Friendly Format    Send to a Friend  Send to a Friend    RSS Feed  RSS Feed
  Share   Share link on Twitter Tweet  

© 1999-2014 The Police News. All rights reserved.