{
  "abstract": "Purpose Continuous curvilinear capsulorhexis (CCC) quality affects posterior capsule opacification and visual outcomes after cataract surgery. We developed a novel metric, the Capsulotomy Proficiency Index (CPI), to objectively evaluate the CCC manipulation during cataract surgery.Methods We developed a self-design code using MATLAB software to outline the motion trail of the capsulorhexis forceps, the surgical field motion amplitude, the CCC profile (circularity, deviation, decentration), the number of grasps and the total and effective CCC operating time, etc. Considering the weight of each parameter, an integrated CPI value was used to evaluate each CCC surgical video. A Mann-Whitney U test was used to compare the mean CPI from the two groups.Results This study included two surgeons with different total cataract surgery volumes (group A: a surgeon with experience of less than 500 cases, group B: a surgeon with experience of more than 1000 cases). 15 CCC videos from each surgeon during the same working period were randomly selected. Group A demonstrated a significantly lower CPI mean value than group B (0.47±0.32 and 0.89±0.23), indicating a significant difference in surgical level.Conclusions Based on the objective CCC surgical video evaluation, the CPI could reflect the surgical level difference in CCC manipulation.",
  "authors": [
    {
      "affiliations": [
        "Shanxi Key Laboratory of Ophthalmology, Shanxi Eye Hospital, Taiyuan, Shanxi, People's Republic of China",
        "Department of Ophthalmology, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China"
      ],
      "name": "Jing Dong"
    },
    {
      "affiliations": [
        "Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China"
      ],
      "name": "Yating Xu"
    },
    {
      "affiliations": [
        "Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China"
      ],
      "name": "Hongda Gong"
    },
    {
      "affiliations": [
        "School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai, People's Republic of China"
      ],
      "name": "Xiaoliang Wang"
    },
    {
      "affiliations": [
        "Department of Cataract, Shanxi Aier Eye Hospital, Taiyuan, Shanxi, People's Republic of China"
      ],
      "name": "Minghui Deng"
    },
    {
      "affiliations": [
        "Shanxi Eye Hospital Affiliated to Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China"
      ],
      "name": "Junhong Li"
    },
    {
      "affiliations": [
        "Shanxi Eye Hospital Affiliated to Shanxi Medical University, Taiyuan, Shanxi, People's Republic of China"
      ],
      "name": "Xiaogang Wang"
    }
  ],
  "title": "Evaluating continuous curvilinear capsulorhexis proficiency via video analysis",
  "uid": "f523866f-693f-5a40-bb7e-9f4ffc011438"
}