Cataract procedure, IOL placed with known cortical material not fully removed.

In this 69-year-old male with visually significant cataract and documented miotic pupil pre-operatively, the operative note confirms that a pupil-expanding device such as iris hooks, Malyugin ring were not used. In complex cataract cases with small pupils, SOC generally dictates the use of mechanical pupil expansion to ensure adequate visualization and complete lens removal, thereby minimizing the risk of retained nuclear/cortical material. During surgery, significant residual lens material was left behind, yet an intraocular lens (IOL) was implanted over the retained fragments. Standard cataract surgery teaching and AAO Preferred Practice Patterns emphasize complete removal of cataract material before IOL implantation whenever feasible, as retained lens fragments are well-recognized to increase the risk of severe postoperative inflammation, elevated IOP, cystoid macular edema (CME), and secondary glaucoma. The decision to proceed without full lens removal, coupled with IOL placement in the setting of known retained material, likely contributed to the cascade of complications—vitrectomy/lensectomy, IOL dislocation, anterior chamber IOL placement, persistent inflammation, corneal edema, CME, and progressive glaucomatous optic neuropathy. While some surgical complications can occur despite appropriate care, the combination of (1) not using a pupil expansion device in a known miotic pupil, (2) leaving substantial lens fragments in situ, and (3) still implanting an IOL may represent a departure from the expected SOC in complex cataract management. These decisions plausibly set in motion the series of postoperative events leading to permanent visual loss (20/150 OD).

The patient’s current poor vision in the right eye (20/150+1) is plausibly linked to the cascade of events initiated during the first cataract surgery. The absence of a pupil expansion device in a pre-operatively miotic pupil likely contributed to incomplete visualization and inadequate cataract removal. Implanting an IOL in the presence of substantial retained lens material is known to markedly increase the risk of postoperative inflammation, intraocular pressure spikes, cystoid macular edema, and secondary glaucoma. These early postoperative complications necessitated multiple additional intraocular surgeries (vitrectomy/lensectomy, IOL exchange to anterior chamber IOL). Each additional surgery carried incremental risk of corneal endothelial loss, chronic inflammation, CME, and optic nerve damage. The combination of corneal edema, persistent CME, and new moderate primary open-angle glaucoma ultimately resulted in permanent visual loss. Given the well-established pathophysiology and timeline, the initial intraoperative choices—particularly leaving significant retained fragments and proceeding with IOL implantation—were a substantial contributing cause to the patient’s current visual impairment. While some damage may have been unavoidable due to preexisting ocular status, the severity and progression are consistent with complications known to arise from these intraoperative decisions

A small pupil is a risk for capsular rupture. It is standard of care to place a lens in the event of capsular rupture if there is ample support for one even if there is there is retained lens material

As stated above, the patient had a poor outcome. However this is a known complication of cataract surgery and a known risk of cataract surgery and was appropriately managed with appropriate referral to the retinal specialist to treat the retained lens material

The central question is whether failure to completely remove the cataract was outside the standard of care, and I do not think it was. The surgeon encountered a miotic pupil intraoperatively, which prevented adequate visualization of the whole cataract. If the surgeon had aggressively pursued complete removal of all lens material, it would have risked an unintended injury to the lens capsule and potential complications from that. While it is true that this patient subsequently had complications, the only foreseeable consequence of the cataract surgeon's decision was that the patient would likely need a second surgery to remove the residual cortical material. On the whole, this was the "lesser of two evils" given the situation the surgeon encountered during the surgery. It is consistent with standard of care because it did not put the patient at inherent risk of dangerous complications and represented a "do no harm" approach.

It is true that complications from the first surgery were the cause of future complications in this patient's case, but the complications from the first surgery were not the result of negligence or any meaningful departure from standard of care.

The decision to perform cataract surgery on a mature cataract (needing trypan blue) in a patient with small pupil is a difficult one. While pupil expansion devices (Malyugin ring, etc) often make the surgery easier, the surgeon performed a sphincterotomy with vannas scissors, which would have helped with dilation. He appears to have removed the majority of the lens material in order to place the IOL in the capsular bag. However, there appears to have been some residual cortex posterior to the IOL. This is not unheard of, and is usually treated with laser capsulotomy if there is minimal material remaining. The decision to perform a PPV to remove the lens material makes me wonder how much lens material remained, and whether there was some defect in the posterior capsule in addition to the cortical material. Need more information, specifically operative report and exam notes from retinal surgeon outlining the reason for PPV to get the cortical material. The dislocation of the IOL is not likely due to the cortical material remaining

we really need much more information to make a decision about causation. Residual cortical material in itself is not typically met with such a tumultuous course. I do not believe the cortical material remnant caused the issue, unless there was a capsule defect at the time of cataract surgery that was not noted on the op note. In that case, a lens placed in the capsular bag may have been dislocated, needing a PPV approach to deal with the cortical material. Again, we need more infomration.

To determine whether or not there was an error, we'd need to look at the records in more detail to evaluate inflammation and intraocular pressure

mismanagement of retained lens fragments