April 2014
Volume 55, Issue 13
ARVO Annual Meeting Abstract  |   April 2014
Force Data Measurements during Manual Small Incision Cataract Surgery
Author Affiliations & Notes
  • Ajay Singh
    Ophthalmology, University of Kansas, Prairie Village, KS
  • Beau T Bryan
    Ophthalmology, Scott & White Eye Institute, Temple, TX
  • Glenn Strauss
    Help Me See, Inc., New York, NY
  • Footnotes
    Commercial Relationships Ajay Singh, None; Beau Bryan, None; Glenn Strauss, None
  • Footnotes
    Support None
Investigative Ophthalmology & Visual Science April 2014, Vol.55, 1294. doi:https://doi.org/
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    • Get Citation

      Ajay Singh, Beau T Bryan, Glenn Strauss; Force Data Measurements during Manual Small Incision Cataract Surgery. Invest. Ophthalmol. Vis. Sci. 2014;55(13):1294. doi: https://doi.org/.

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

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To measure forces generated during major steps of manual small incision cataract surgery


14 eyes underwent MSICS surgery by the same surgeon. A force-sensing transducer probe attached to surgical instruments was used to measure the force generated during the major steps of the surgery. Forces generated during horizontal, vertical and antero-posterior maneuvers were recorded. All feedback from the transducer was correlated with video footage of the surgical steps (Fig 1.). Forces were measured during scleral tunneling, paracentesis entry, anterior chamber entry through the scleral tunnel, capsulotomy, lens vectis assisted lens removal and IOL dialing.


Scleral tunneling produced an average force of 48.6g (range 115.8-4.8). Paracentesis incision produced an average force of 23.4g (range 55.6-13.). Anterior chamber entry through the scleral tunnel produced an average force of 22.9g (range 52.0- 2.1). No significant forces were noted during lens capsule dissection; however repositioning forces were recorded as an average force of 23.6g (range 48.0-10.9). Lens vectis assisted removal of the cataractous lens averaged 35.1g (range 66.3-7.8). Sinskey hook assisted IOL dialing produced an average force of 4.7g (range 7.4-1.6).


This unique technique detects significant and variable forces that are produced during an MSICS procedure. The maximum force generated during this surgery is detected during scleral tunnel construction and the minimum force is generated during anterior lens capsule engagement. A careful recording and study of intraoperative forces will be a helpful guide for generating a haptic (tactile) based MSICS surgical simulator.

Keywords: 445 cataract • 716 small incision cataract surgery • 708 sclera  

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