Cataract Surgery Expert Witness

The Medical-Legal Question in Cataract Cases

Modern cataract surgery is phacoemulsification — ultrasonic fragmentation and removal of the clouded natural lens — followed by implantation of an intraocular lens (IOL). Because the operation is common, brief, and usually successful, juries and even attorneys can assume that any bad result implies error. The medical question is narrower: did the surgeon's decisions and technique, at each stage, fall within what a reasonably careful ophthalmologist would do? Answering it requires an expert who actually performs the operation and can read an operative note critically. Dr. Shomer's approach to these questions is described more broadly on the ophthalmology malpractice expert page.

Common Allegations

Recurring fact patterns in cataract litigation include:

• Wrong IOL power or wrong lens — a lens of incorrect power, or a lens intended for a different patient or the fellow eye, is implanted. These claims hinge on the biometry, the surgical plan, and the operating-room verification process.
• Wrong-site or wrong-IOL events — surgery on the wrong eye or implantation of an unintended model, implicating time-out and verification protocols.
• Posterior capsule rupture — a tear in the thin membrane that supports the IOL. This is a known complication of the operation; the analysis usually concerns recognition and management, not the tear itself.
• Dropped nucleus and retained lens fragments — lens material descending into the vitreous cavity or left in the eye, and whether referral to a vitreoretinal surgeon was timely.
• Endophthalmitis — infection inside the eye, a rare but devastating complication; questions center on prophylaxis, the speed of diagnosis, and treatment.
• Corneal decompensation — persistent corneal swelling after surgery, sometimes related to pre-existing endothelial disease that should appear in the preoperative assessment.

Records That Matter

Three categories of records carry most of the weight. First, the biometry — the optical or ultrasonic measurements of the eye used to calculate IOL power — together with the formula used and the printed calculation sheet. Second, the operative note, read alongside anesthesia and nursing records, which often reveal details the dictated note omits. Third, the informed consent documentation, including whether the specific risks that materialized were discussed. Preoperative clinic notes and every postoperative visit complete the picture. Guidance on assembling these materials appears in what records to provide, and organized review is available through medical record review.

Complication Versus Negligence

The central analytic distinction in nearly every cataract case: a recognized complication, disclosed in advance and managed appropriately, is not negligence. Posterior capsule rupture occurs in a small fraction of cases in experienced hands. Endophthalmitis can follow a flawless operation. What converts a complication into a potential deviation is usually something surrounding it — a missed preoperative risk factor, a failure to recognize the complication intraoperatively, a delayed response to postoperative warning signs, or documentation that does not support the care described. The standard-of-care framework for these cases is developed in detail on the cataract surgery standard of care page.

What an Honest Review Can and Cannot Establish

Record review can establish what was measured, planned, done, and documented, and whether those steps were reasonable. It cannot reconstruct moments the record does not capture, and it cannot convert an undesired refractive or visual outcome into negligence by itself. Where the record is genuinely ambiguous, a credible expert says so — an opinion that survives cross-examination is worth more to either side than an aggressive one that does not.

What Attorneys Should Provide

The complete perioperative record: preoperative examination and biometry (all printouts), consent forms, the operative report with anesthesia and nursing records, all postoperative visits, and any subsequent-treater records, including referrals to retina or cornea specialists. Imaging such as OCT (optical coherence tomography, a cross-sectional scan of the retina) should be provided as images, not merely as reports, whenever possible.

Frequently Asked Questions