title: Translenticular hydrodissection, lens fragmentation, and influence on ultrasound power in femtosecond laser-assisted cataract surgery and refractive lens exchange.
abstract: OBJECTIVE
  To compare ultrasound time (UST) during femtosecond laser-assisted and conventional cataract surgery or refractive lens exchange and evaluate UST during femtosecond laser surgery with and without a new technique, translenticular hydrodissection.
  
  
  METHODS
  Centre for Sight, East Grinstead, West Sussex, United Kingdom.
  
  
  METHODS
  Comparative case series.
  
  
  METHODS
  This single-surgeon study compared consecutive femtosecond laser-assisted surgery (with and without translenticular hydrodissection to assist lens mobilization) and consecutive conventional surgery performed immediately before adoption of femtosecond laser technology. The mean US power, UST, and effective phacoemulsification time (EPT) in the 2 groups were compared. Further analysis of the femtosecond group compared translenticular hydrodissection and no translenticular hydrodissection.
  
  
  RESULTS
  The mean US power, UST, and EPT were significantly longer in the conventional group (n = 108) than in the femtosecond group (n = 108) as follows: 7.30% ± 2.56% (SD) versus 5.32% ± 2.48% (P=.000); 9.89 ± 5.32 seconds versus 8.58 ± 4.66 seconds (P=.044); 0.87 ± 0.85 seconds versus 0.57 ± 0.51 seconds (P=.002), respectively. In the femtosecond group, parameters were significantly higher in eyes without translenticular hydrodissection (n = 27) than in eyes with translenticular hydrodissection (n = 81) as follows: 5.78% ± 2.23% versus 5.16% ± 2.56% (P=.046); 10.95 ± 4.66 seconds versus 7.78 ± 4.41 seconds (P=.046); 0.72 ± 0.26 seconds versus 0.52 ± 0.53 seconds (P=.002), respectively.
  
  
  CONCLUSIONS
  Femtosecond laser capsulotomy and lens fragmentation statistically significantly reduced UST over conventional surgery. Translenticular hydrodissection further reduced UST.
authors.affiliation: From the Centre for Sight, Hazelden Place, East Grinstead, West Sussex, United Kingdom. Electronic address: sdaya@centreforsight.com.
authors.forename: Sheraz M
authors.initials: SM
authors.lastname: Daya
authors.affiliation: From the Centre for Sight, Hazelden Place, East Grinstead, West Sussex, United Kingdom.
authors.forename: Mayank A
authors.initials: MA
authors.lastname: Nanavaty
authors.affiliation: From the Centre for Sight, Hazelden Place, East Grinstead, West Sussex, United Kingdom.
authors.forename: Marcela M
authors.initials: MM
authors.lastname: Espinosa-Lagana
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D057866:Anterior Capsule of the Lens / Q000601:surgery; D005260:Female; D006801:Humans; D053685:Laser Therapy / Q000379:methods*; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods*; D012029:Refraction, Ocular / Q000502:physiology; D013997:Time Factors; D041623:Tomography, Optical Coherence; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology