June 2015
Volume 56, Issue 7
Free
ARVO Annual Meeting Abstract  |   June 2015
Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons.
Author Affiliations & Notes
  • Augustinus Laude
    National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, Singapore
  • Praseedha Krishnan Aniyath
    School of Computer Engineering, Nanyang Technological University, Singapore, Singapore
  • Kiam Tian Seow
    School of Computer Engineering, Nanyang Technological University, Singapore, Singapore
  • Jian Wah Kwok
    National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, Singapore
  • Han Bor Fam
    National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, Singapore
  • Wee Jin Heng
    National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, Singapore
  • Deepu Rajan
    School of Computer Engineering, Nanyang Technological University, Singapore, Singapore
  • Footnotes
    Commercial Relationships Augustinus Laude, None; Praseedha Aniyath, None; Kiam Tian Seow, None; Jian Wah Kwok, None; Han Bor Fam, None; Wee Jin Heng, None; Deepu Rajan, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science June 2015, Vol.56, 132. doi:
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Augustinus Laude, Praseedha Krishnan Aniyath, Kiam Tian Seow, Jian Wah Kwok, Han Bor Fam, Wee Jin Heng, Deepu Rajan; Computer-aided evaluation of cataract surgery; a metric comparison of continuous circular capsulorhexis by trainee and specialist surgeons.. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):132.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract
 
Purpose
 

There is a correlation between the centration and quality of the continuous circular capsulorhexis (CCC) and the subsequent refractive outcomes in cataract surgery. We developed a novel software evaluation tool based on video processing to assess the execution of CCC by comparing trainee and specialist surgeons from a teaching hospital. The software incorporates a novel performance metric that quantifies their performance.

 
Methods
 

We first detected the limbus of the eye in each video frame using Hough circle detection. Next, the capsulorhexis forceps is detected based on its linearity and specularity. Then a visual tool-tracking function is invoked based on an image similarity measure which is illumination invariant and computationally inexpensive. The number of capsular grasps is then found from a functional plot of distance between the pair of forceps tips. Other parameters computed include surgical efficiency with respect to surgical time, circularity index and absolute decentration of the CCC with respect to the optical centre. These parameters are integrated into a single novel performance metric for each surgery (Fig 1).

 
Results
 

The software was implemented in MATLAB and we evaluated 35 capsulorhexis videos of surgeries done by 19 specialist and 16 trainee surgeons. The quantitative parameters for all videos are listed in Fig 2. A student t-test comparison of the mean performance metric scores found that the trainee group scored 0.4244 (±0.2322) which was significantly lower than the specialist group which scored 0.8676 (±0.1211) (P=0.0001), indicating that the two groups could be differentiated.

 
Conclusions
 

We developed a tool for evaluation of the performance of capsulorhexis during cataract surgery. The proposed performance metric computed by the software could differentiate the two groups of surgeons. Using quantitative parameters, we can have an objective and repeatable way for surgical assessment to identify areas for improvement.  

 
Fig.1 Computer-aided metric evaluation for CCC.
 
Fig.1 Computer-aided metric evaluation for CCC.
 
 
Fig.2. Performance parameters of (a) specialist and (b) trainee surgeons performing capsulorhexis.
 
Fig.2. Performance parameters of (a) specialist and (b) trainee surgeons performing capsulorhexis.

 
×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×