Comparison of Microcoaxial Phacoemulsification (1.8 mm System Versus 2.2 mm System) in Mature Cataract

1
Comparison of Microcoaxial Phacoemulsification
(1.8 mm System Versus 2.2 mm System) in Mature
Cataract

• Eun Chul Kim M.D.
• Man Soo Kim M.D.
• Department of Ophthalmology and Visual Science,
• The Catholic University of Korea

The authors have no financial interest in the
subject matter of this poster.
2
Purpose

• To compare the postoperative results of
  microcoaxial cataract surgery (MCCS) in mature
  cataract using 1.8mm incision (Stellaris Vision
  Enhancement System, Bausch Lomb Inc., USA),
  2.2mm incision (Infinity Vision System, Alcon
  Laboratories, Inc., USA), and 2.75mm incision
  (Infinity Vision System).

3
Patients and Methods

• Retrospective Comparative study
• Total 120 eyes of 96 patients
• 1.8mm Group (Stellaris Group) 40 eyes
• 2.2mm Group (Infinity Group) 40 eyes
• 2.75mm Group (Infinity Group) 40 eyes- control
• Incision site Temporal incision
• No suture
• Cataract grade IV according to the Lens Opacities
  Classification System III scale

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ResultsPatients demographics
1.8mm Group 2.2mm Group 2.75mm Group
Eyes 40 40 40
Age 75.47.62 77.57.83 74.78.59
BCVA (LogMAR) 0.810.10 0.830.15 0.840.21
Astigmatism 0.820.59 1.040.58 1.151.22
Axial Length (mm) 22.90.86 22.90.73 23.20.95
ECD (cells/mm²) 2634.7352.19 2724.4326.47 2633.7281.49
CV 44.27.91 41.13.73 45.69.78
Hexagonality 51.18.28 55.09.90 51.410.13
No statistical difference among three groups.
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Phacoemulsification time (sec)
Cumulative Dissipated Energy (CDE)

• Phacoemulsification time and CDE 1.8 mm gt 2.2
  mm gt 2.75mm
• No statistical difference

6
Visual Acuity (LogMAR)
No statistical difference in BCVA.
7
Endothelium
Mean Endothelial Cell Density (cell/?)
PreOP 1month 2months
1.8mm Group 2634.7352.19 1532.5253.20 1661.9543.25
2.2mm Group 2724.4326.47 1763.5508.12 1794.3782.41
2.75mm Group 2633.7281.49 1529.7473.07 1706.9561.90
No statistical difference in percentage of
endothelial cell loss after cataract operation
among three group.
8
Surgical induced astigmatism

• At the 2 months after operation
• Vector analysis
• 1.8mm Group 0.22 0.19 Diopters
• 2.2mm Group 0.30 0.24 Diopters
• 2.75mm Group 0.44 0.29 Diopters (Plt0.05)

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Conclusion

• We could not find any statistically significant
  difference in phacoemulsification time, CDE, and
  visual outcome among 1.8mm, 2.2mm, and 2.75mm
  incision.
• 2.75mm incision induced more astigmatism than
  1.8mm and 2.2mm incision after cataract surgery
  (P lt0.05).
• 1.8 mm and 2.2mm MCCS are as effective
  as 2.75 mm cataract surgery.