J Korean Ophthalmol Soc.  2014 Dec;55(12):1800-1807. 10.3341/jkos.2014.55.12.1800.

Comparison of Continuous Curvilinear Capsulorhexis Parameters between Femtosecond Laser and Conventional Cataract Surgery

• Park JH
• Lee KH
• Lee DJ

• KMID: 2338963
• DOI: http://doi.org/10.3341/jkos.2014.55.12.1800

Abstract

PURPOSE
To compare parameters of femtosecond laser and manual continuous curvilinear capsulorhexis (CCC) using anterior segment optical coherence tomography (AS-OCT).
METHODS
Femtosecond laser cataract surgery was performed in 30 eyes of 30 patients, and conventional cataract surgery with a manual CCC in 30 eyes of 30 patients. One month after surgery, CCC diameters, circularity of capsulotomy, and distance between the CCC and pupil center were analyzed using the AS-OCT.
RESULTS
Mean maximal CCC diameter was 4.96 +/- 0.23 mm in the femtosecond laser group, and 4.70 +/- 0.82 mm in the manual CCC group. Mean minimal CCC diameter was 4.91 +/- 0.23 mm in the femtosecond group, and 4.48 +/- 0.64 mm in the manual CCC group showing significant difference between the two groups (p = 0.000). Circularity of capsulotomy was 0.99 +/- 0.01 in the femtosecond group and 0.91 +/- 0.13 in the manual CCC group and was statistically different between the 2 groups (p = 0.000). The distance from the CCC center to the pupil center was 0.18 +/- 0.09 mm in the femtosecond group and 0.26 +/- 0.17 mm in the manual CCC group. The CCC center was closer to the pupil center in the femtosecond than in the manual CCC group (p = 0.038).
CONCLUSIONS
Properly sized and shaped capsulotomy can be expected in femtosecond laser CCC compared with manual CCC.

Keyword

Capsulotomy; Circularity; Femtosecond cataract surgery

MeSH Terms

Capsulorhexis*
Cataract*
Humans
Pupil
Tomography, Optical Coherence

Figure

• 

  Figure 1. Anterior segment optical coherence tomography (AS-OCT) images of manually created continuous curvilinear capsulorhexis (CCC) (red line). (A) With CASIA (Tomey, Tokyo, Japan), pupil center could be automatically calculated and setted as (x = 0, y = 0) mm. (B) Displayed value (x, y) of the red point means the distance from pupil (mm). (C) To get the value of CCC center, the values of 8 points in manual CCC margin (per 45 degree) were measured. (D) The mean value of 8 points are presented at the bottom of the image, and displayed as CCC center (red arrow). (E) Intraocular lens (IOL) margin is presented as yellow line. To get the value of IOL center, the values of 8 points in IOL margin (per 45 degree) were measured. (F) CCC center (red arrow) and the value of CCC center (red rectangle), IOL center and the value of IOL center (yellow rectangle).

• 

  Figure 2. Anterior segment optical coherence tomography (AS-OCT) images of femtosecond laser created continuous curvilinear capsulorhexis (CCC) (red line). (A) Note the perfectly round and regularly shaped CCC. Intraocular lens (IOL) margin is presented as yellow line. (B) The value of femtosecond laser CCC center was calculated by the same method as manual CCC. (C) The value of femtosecond laser CCC center is presented at the bottom of the image. (D) CCC center (red arrow) and the value of CCC center (red rectangle), IOL center and the value of IOL center (yellow rectangle).

Reference

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