title: Perioperative visual changes.
abstract: BACKGROUND
  The goal of this project was to describe the frequency and natural history of perioperative changes in vision.
  
  
  METHODS
  The authors performed a prospective evaluation of changes in visual accommodation and acuity in adult patients undergoing various surgical procedures. Patients were evaluated preoperatively and at 1 and 3 days postoperatively. For patients who had persistent blurring of vision on the third postoperative day, surveillance was extended to 1.5 yr to determine how long the visual changes persisted and if the patients required eye-care provider attention for the condition.
  
  
  RESULTS
  Twenty-eight of 671 patients (4.2%) reported new onset of blurred vision lasting at least 3 days after surgery. Seven of these 28 patients (1% of total) required either new corrective lens or changes in eyeglass or contact prescriptions because of persistent blurry vision. Most of the remaining patients reported resolution of blurry vision within 1 to 2 months. No significant risk factors for this problem were identified.
  
  
  CONCLUSIONS
  In this surgical population, changes in visual acuity manifest primarily by blurred vision were reported at a surprisingly high frequency. For many of these patients, the blurring resolved within 2 months without complication, but 25% of patients who had blurred vision for 3 days or longer required visits to eye-care providers and either new corrective lens or changes in existing prescriptions.
authors.affiliation: Department of Anesthesiology, Mayo Foundation, Rochester, Minnesota 55905, USA. warner.mary@mayo.edu
authors.forename: Mary E
authors.initials: ME
authors.lastname: Warner
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Fronapfel
authors.forename: James R
authors.initials: JR
authors.lastname: Hebl
authors.forename: David C
authors.initials: DC
authors.lastname: Herman
authors.forename: David O
authors.initials: DO
authors.lastname: Warner
authors.forename: Paul
authors.initials: P
authors.lastname: Decker
authors.forename: Mark A
authors.initials: MA
authors.lastname: Warner
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology*; D011446:Prospective Studies; D012307:Risk Factors; D014786:Vision Disorders / Q000209:etiology*