Manual small incision cataract surgery (MSICS) is a gold standard for high-volume cataract services in developing countries. Since recently (with the rise of global ophthalmology concept) it has become part of the best ophthalmology training programs in the US and across the world. It is an absolutely brilliant and gentle technique, which is especially suited for premature, mature and hypermature cataracts, as well as traumatic and congenital cataracts. But one can also apply the same technique to operate on immature cataracts. Here it won’t be so fast, as the aspiration of sticky cortex will take its time with Simcoe cannula. Nevertheless, all the stages are doable.
There are differences in capsulotomy diameter, which one needs for “normal” immature cataracts (~5-6 mm) and for hypermature cataracts (up to 9-10 mm!). In mature cataracts one has to use a dye (trypan blue), but also often to carefully decompress an elevated intralenticular pressure (which often fails and leads to capsular tear and/or “argentinian flag”-style tears)! This makes capsulotomy (and capsulorhexis as one of them) in mature cataracts more complex if compared to the one in immature “transparent” cataracts.
For MSICS I personally preferred mainly a so-called “can-opener” type of capsulotomy, as it is a) easier, b) faster, and c) safer. Once I had realized these benefits, I switched to this technique almost invariably. Can-opener is best for big mature nuclei and also for Morgagnian cataracts. I am, however, aware, that can-opener is almost always not a good option for phaco. At the same time I found continuous curvilinear capsulorhexis (CCC) technique in transparent (immature) cataracts pretty easy to perform in comparison to intumescent hypermature cataracts. However, CCC is also possible by MSICS on mature cataracts. One can do it through both a tunnel or a paracentesis. A tunnel offers greater maneuverability, a paracentesis offers more stable anterior chamber.
For CCC in MSICS one can employ a) insuline syringe needle, b) Utrata forceps (gives the best control over rhexis!) and c) McPherson tying forceps. The latter is non-toothed and is a sort of improvisation, when the correct forceps is inavailable (often the case in Tropics!). In this video I depicted typical variants of CCC by mature and hypermature (and intumescent and Morgagnian!) cataracts, both uncomplicated and complicated cases. The can-opener technique is presented in two cases here and also in the other video of this channel.
* Some of the videos were screened at the earlier stage of my MSICS career. Some of the capsulotomies depicted here could have been managed better, and do not necessarily represent the best possible surgical technique. After I had bought Utrata capsulorhexis-forceps during my trip to the USA in early 2017, I never used McPherson for this purpose anymore. So, I highly recommend to purchase Utrata early in your MSICS career. The video will however be a good one for the MSICS beginners in the tropics, who often have to tackle the complex intumescent lenses with suboptimal instruments, and who still have the right to do mistakes 🙂 I would anyways appreciate your (also critical) comments.
Those of you, who just start with MSICS – Keep it up!
Thanks for watching!