Monitoring of Drusen and Geographic Atrophy Area Size after Cataract Surgery Using the MD3RI Tool for Computer-Aided Contour Drawing

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Background/Aims: To monitor possible changes in the cumulated drusen or geographic atrophy area size (CDGAS) of nonexudative age-related macular degeneration (AMD) in patients before and after cataract surgery, using a new tool for computer-aided image quantification. Methods: Randomized, prospective, clinical trial. 54 patients with cataract and nonexudative AMD were randomly assigned into an early surgery group (ES = 28) and a control group (CO = 26) with a 6-month delay of surgery. CDGAS was determined with the MD3RI tool for contour drawing in a central region of digitized fundus photographs, measuring 3,000 µm in diameter. To evaluate CDGAS progression, differences in pixels and square millimeters were calculated by equivalent tests. Results: Forty-nine patients completed the visits over the 12-month period (ES = 27 and CO = 22). Mean pixel values increased from 201.5 (11.33 × 10(-3) mm(2)) to 202.7 (11.39 × 10(-3) mm(2)) in the ES group and from 191.6 (10.77 × 10(-3) mm(2)) to 194.6 (10.94 × 10(-3) mm(2)) in the CO group. Finally, equivalence of CDGAS differences between ES and CO could be demonstrated. No exudative AMD was recorded during the study period. Conclusion: In our cohorts, no significant changes were found in CDGAS 12 months after cataract surgery. The MD3RI software could serve as an efficient, precise and objective tool for AMD quantification and monitoring in future trials.
Original languageUnknown
Pages (from-to)86-93
JournalOphthalmologica. Journal international d'ophtalmologie. International journal of ophthalmology. Zeitschrift fur Augenheilkunde
Issue number2
Publication statusPublished - 1 Jan 2012


  • Cataract surgery
  • Drusen
  • Geographic atrophy
  • Nonexudative age-related macular degeneration
  • article
  • cataract
  • cataract extraction
  • cohort analysis
  • computer assisted radiography
  • computer program
  • controlled study
  • cumulated drusen or geographic atrophy area size
  • disease marker
  • drusen
  • eye fundus
  • fluorescence angiography
  • geographic atrophy
  • human
  • major clinical study
  • ophthalmoscopy
  • patient monitoring
  • quantitative analysis
  • randomized controlled trial
  • retina macula age related degeneration
  • therapy delay
  • visual acuity

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