J Korean Ophthalmol Soc.  2008 Jun;49(6):904-910. 10.3341/jkos.2008.49.6.904.

Comparative Study of Microcoaxial Cataract Surgery and Conventional Cataract Surgery

• Choi JA
• Chung SK
• Kim HS

• KMID: 2110870
• DOI: http://doi.org/10.3341/jkos.2008.49.6.904

Abstract

PURPOSE: To compare the postoperative results of 2.2 mm microcoaxial cataract surgery (MCCS) and conventional 3.0 mm cataract surgery (CCS).
METHODS
This study included 30 patients (40 eyes): 17 patients (21 eyes) had microcoaxial cataract surgery using a 2.2 mm microcorneal incision, and 13 patients (19 eyes) had conventional cataract surgery using a 3.0 mm corneal incision. In these two groups, we measured phacoemulsification time, total phacoemulsification percentage, and effective phacoemulsification time (EPT) during cataract surgery. We compared corneal thickness, endothelial cell count, uncorrected visual acuity, best corrected visual acuity, and surgically, induced astigmatism (SIA) by corneal topography between the two groups preoperatively and at 1 day, 1 week, 1 month, and 2 months postoperatively.
RESULTS
There were significantly lower SIA (p=0.025) at postoperative day 1 in MCCS, and there was no significant difference after that. No difference in phacoemulsification time, total phacoemulsification percentage, EPT, corneal thickness, postoperative uncorrected visual acuity or corrected visual acuity was noted between MCCS and CCS.
CONCLUSIONS
MCCS using a 2.2 mm small corneal incision appears to be a safe and advanced procedure with a smaller amount of surgically-induced astigmatism during the early postoperative period.

Keyword

Conventional cataract surgery; Microcoaxial cataract surgery; Microincision; Microincisional cataract surgery; Phacoemulsification

MeSH Terms

Astigmatism
Cataract
Corneal Topography
Endothelial Cells
Humans
Phacoemulsification
Postoperative Period
Visual Acuity

Figure

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  Figure 1. Postoperative changes in corneal thickness (µm); The corneal thickness was increased at postoperative 1 day in both MCCS (microcoaxial cataract surgery) and CCS (conventional cataract surgery) group. After that, it was decreased gradually, but the differences between 2 groups were not statistically significant. The statistical analysis was performed using independent t-test. A P-value less than 0.05 is statistically significant.

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  Figure 2. Postoperative changes in corneal endothelial cell count (cells/mm2); The corneal endothelial cell was gradually decreased postoperatively in both MCCS (microcoaxial cataract surgery) and CCS (conventional cataract surgery) group. But the differences between 2 groups were not statistically significant. The statistical analysis was performed using independent t-test. A P-value less than 0.05 was considered as statistically significant.

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  Figure 3. Perioperative surgically induced astigmatism (Diopter); The surgically induced astigmatism (SIA) by vectorial analysis was significantly smaller in MCCS (microcoaxial cataract surgery) group than CCS (conventional cataract surgery) group at postoperative 1 day. And after that, smaller SIA continued in MCCS group, but the difference was not significantly different. The statistical analysis was performed using independent t-test. A P-value less than 0.05 was considered as statistically significant.

Reference

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