title: Macular edema after cataract surgery in eyes without preoperative central-involved diabetic macular edema.
abstract: OBJECTIVE
  The incidence of development or worsening of macular edema (ME) is variable in eyes without diabetic ME (DME) undergoing cataract surgery.
  
  
  OBJECTIVE
  To estimate the incidence of central-involved ME 16 weeks following cataract surgery in eyes with diabetic retinopathy without definite central-involved DME preoperatively.
  
  
  METHODS
  In a multicenter, prospective, observational study, 293 participants with diabetic retinopathy without definite central subfield thickening on optical coherence tomography (OCT) underwent cataract surgery.
  
  
  METHODS
  Cataract extraction surgery performed within 28 days of enrollment of eyes without DME in individuals with diabetes mellitus.
  
  
  METHODS
  Development of central-involved ME defined as the following: (1) OCT central subfield thickness of 250 μm or greater (time-domain OCT) or 310 μm or greater (spectral-domain OCT) with at least a 1-step increase in logOCT central subfield thickness preoperatively to the 16-week visit; (2) at least a 2-step increase in logOCT central subfield thickness preoperatively to the 16-week visit; or (3) nontopical treatment for ME received before the 16-week visit with either of the OCT criteria met at the time of treatment.
  
  
  RESULTS
  The median participant age was 65 years. The median visual acuity letter score was 69 letters (Snellen equivalent 20/40). Forty-four percent of eyes had a history of treatment for DME. Sixteen weeks postoperatively, central-involved ME was noted in 0% (95% CI, 0%-20%) of 17 eyes with no preoperative DME. Of eyes with non-central-involved DME, 10% (95% CI, 5%-18%) of 97 eyes without central-involved DME and 12% (95% CI, 7%-19%) of 147 eyes with possible central-involved DME at baseline progressed to central-involved ME. History of DME treatment was significantly associated with central-involved ME development (P < .001).
  
  
  CONCLUSIONS
  In eyes with diabetic retinopathy without concurrent central-involved DME, presence of non-central-involved DME immediately prior to cataract surgery or history of DME treatment may increase the risk of developing central-involved ME 16 weeks after cataract extraction.
authors.affiliation: Paducah Retinal Center, Paducah, KY, USA.
authors.forename: Carl W
authors.initials: CW
authors.lastname: Baker
authors.forename: Talat
authors.initials: T
authors.lastname: Almukhtar
authors.forename: Neil M
authors.initials: NM
authors.lastname: Bressler
authors.forename: Adam R
authors.initials: AR
authors.lastname: Glassman
authors.forename: Sandeep
authors.initials: S
authors.lastname: Grover
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Kim
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Murtha
authors.forename: Michael E
authors.initials: ME
authors.lastname: Rauser
authors.forename: Cynthia
authors.initials: C
authors.lastname: Stockdale
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000209:etiology; D003922:Diabetes Mellitus, Type 1 / Q000150:complications; D003924:Diabetes Mellitus, Type 2 / Q000150:complications; D003930:Diabetic Retinopathy / Q000150:complications* / Q000175:diagnosis; D005260:Female; D005451:Fluorescein Angiography; D006801:Humans; D015994:Incidence; D008269:Macular Edema / Q000175:diagnosis / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011183:Postoperative Complications; D011446:Prospective Studies; D012307:Risk Factors; D041623:Tomography, Optical Coherence; D014792:Visual Acuity / Q000502:physiology