CataractCoach warns 'dimple down' incisions

Cataract surgery looks tiny from the outside. But the first cut does a lot of hidden work. It has to let instruments in, keep the anterior chamber stable, and then seal well enough that the eye does not leak at the end. That is why Uday Devgan’s new CataractCoach video zeroes in on one very specific habit — the “dimple down” incision — and basically says: be careful, because a shortcut at the wound can create problems for the rest of the case. ### What is “dimple down”? It is a way some surgeons enter with the keratome during a clear-corneal cataract incision. Instead of keeping the blade on a balanced tunnel plane, the surgeon points the tip downward to catch deeper stromal fibers before entering the eye. Devgan’s point is not that the move is mysterious — it is that the geometry can go wrong fast, especially for learners. (cataractcoach.com) ### Why does the wound shape matter so much? Because this incision is not just a doorway. It is the foundation for the whole phaco case. A good wound helps maintain fluidic balance in the anterior segment, makes instrument movement smoother, and ends as a watertight, self-sealing tunnel. A bad wound does the opposite — more instability during surgery, more trouble at the end, and more risk if the seal is poor. (youtube.com) ### What goes wrong with the “dimple down” version? The classic problem is imbalance. CataractCoach has described this before in its teaching on tri-planar incisions: when the blade dips down, the incision can end up with a thin roof and a thick floor, creating a chevron-like shape instead of a more even tunnel. That matters because the roof is the part you are counting on to stay strong and appose cleanly when the case is over. (eyewiki.org) If that roof gets too thin, the wound can behave worse than it looked at first pass. ### Why is chamber stability part of this? Phacoemulsification works best when the anterior chamber stays formed and predictable. The main incision is part of that system. If the architecture is off, the wound can gape more easily around instruments or respond poorly to pressure changes. Turns out the “small” decision at the blade tip can become a bigger issue once irrigation, aspiration, and repeated instrument passes start stressing the tunnel. (cataractcoach.com) ### Is this mainly a trainee problem? Mostly, yes. Experienced surgeons can sometimes get away with idiosyncratic motions because they know exactly what tissue feedback they are feeling. Trainees usually do not have that margin. CataractCoach’s whole curriculum is built around standardizing early steps like incision construction for residents, and this warning fits that teaching style — avoid habits that make the wound less reproducible. (eyewiki.org) ### So what is the better principle? Think balance, not force. The goal is a controlled corneal tunnel with architecture that stays stable during the case and seals at the end. EyeWiki’s current review makes the same bigger point — wound construction drives fluidics, recovery, and postoperative safety. In other words, the incision is not a throwaway first step. It is the platform everything else stands on. (youtube.com) ### What should a resident take from this? Not “never innovate.” More like: do not adopt a flourish before you understand the failure mode. If your attending talks about dipping the blade, the useful follow-up question is what that does to roof thickness, floor thickness, chamber stability, and final wound hydration. Those are the real outcomes that matter. (eyewiki.org) ### Bottom line This is a narrow technical warning, but it lands because cataract surgery is a game of compounding small decisions. A millimeter-scale incision can shape the whole case. Devgan’s message is simple — if “dimple down” makes the tunnel less balanced, it is not a clever trick. It is a wound problem waiting to show up. (cataractcoach.com)