title: Correlation of nuclear density using the Lens Opacity Classification System III versus Scheimpflug imaging with phacoemulsification parameters.
abstract: OBJECTIVE
  To grade nuclear cataracts using the Lens Opacity Classification System III (LOCS III) and the correlation with maximum nuclear density on Scheimpflug imaging and phacoemulsification parameters.
  
  
  METHODS
  Tertiary care center.
  
  
  METHODS
  Longitudinal interventional study.
  
  
  METHODS
  The nuclear density of significant age-related cataracts was evaluated by comparing slitlamp images with standard photographic charts of the LOCS III system. Maximum nuclear density was calculated using a Scheimpflug imaging system (Pentacam). All patients had phacoemulsification and posterior chamber intraocular lens implantation. Intraoperatively, parameters (eg, phaco time, power consumed, balanced salt solution used) were noted and compared with different grades of cataract and maximum nuclear densities.
  
  
  RESULTS
  One hundred patients with visually significant age-related cataract were evaluated. There was a positive linear correlation between the LOCS III grading and Scheimpflug maximum nuclear density (P<.001). The LOCS III grading and Scheimpflug maximum nuclear density had a linear correlation with preoperative corrected distance visual acuity (r = 0.588 and r = 0.525, respectively), cumulative dissipated energy (CDE) (r = 0.607 and r = 0.847, respectively), total ultrasound (US) time (r = 0.627 and r = 0.802, respectively), and fluid used (r = 0.623 and r = 0.678, respectively).
  
  
  CONCLUSIONS
  Both systems had a linear correlation with total US power, CDE, and fluid used; however, the Scheimpflug imaging system had a stronger correlation with these phacoemulsification parameters.
authors.affiliation: From the Department of Ophthalmology, Advanced Eye Centre, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
authors.forename: Monika
authors.initials: M
authors.lastname: Gupta
authors.forename: Jagat
authors.initials: J
authors.lastname: Ram
authors.forename: Arun
authors.initials: A
authors.lastname: Jain
authors.forename: Jaspreet
authors.initials: J
authors.lastname: Sukhija
authors.forename: Manish
authors.initials: M
authors.lastname: Chaudhary
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000145:classification*; D003952:Diagnostic Imaging / Q000379:methods*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007907:Lens Nucleus, Crystalline / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D010781:Photography; D011446:Prospective Studies; D014792:Visual Acuity / Q000502:physiology