The Standard of Care in Cataract Surgery
The standard of care in cataract surgery is what a reasonably careful ophthalmologist would do under similar circumstances — not perfection, and not an ideal result. It applies across the whole arc of care: the decision to operate, the informed consent discussion, the measurement of the eye and selection of the intraocular lens (IOL), the conduct of the operation and management of any intraoperative complication, and the postoperative follow-up.
Dr. Marc H. Shomer, a board-certified ophthalmologist in active surgical practice since 2010, evaluates each stage against the contemporaneous record when reviewing cataract cases for plaintiff or defense counsel.
Why Stage-by-Stage Analysis Matters
Cataract claims are rarely about a single dramatic act. More often the question is whether an ordinary decision — to operate on a marginal cataract, to accept an unusual biometry reading, to observe rather than refer — was reasonable at the time it was made, without hindsight. A stage-by-stage framework keeps the analysis anchored to what the surgeon knew and when. The general methodology is described on the standard of care expert page; this page applies it to cataract surgery specifically.
Indications: The Decision to Operate
Cataract surgery is indicated when lens opacity impairs function in a way that matters to the patient, or occasionally for medical reasons such as lens-induced glaucoma. Questions arise when documented visual acuity and complaints seem out of proportion to the decision to operate, or when an alternative cause of blurred vision — macular disease, for example — was not evaluated before surgery. The record should show a cataract consistent with the visual complaint and an examination adequate to exclude other explanations.
Informed Consent
Consent for cataract surgery should cover the material risks — infection, bleeding, capsule rupture, retinal detachment, corneal swelling, the possibility of needing glasses or further surgery — plus alternatives, including observation, and any patient-specific risk elevators such as pseudoexfoliation, prior trauma, or high myopia. For premium IOLs (multifocal or toric lenses carrying additional out-of-pocket cost), the consent conversation about realistic expectations is often the crux of the later dispute. A signed form is evidence of consent but not the whole of it; clinic notes documenting the discussion matter.
Biometry and IOL Selection
Biometry — measurement of the eye's length and corneal curvature to calculate IOL power — is where preventable errors concentrate. The standard of care includes obtaining reliable measurements, rechecking implausible or asymmetric values, choosing an appropriate calculation formula for unusual eyes (very long, very short, or previously lasered corneas), and carrying the intended lens accurately from calculation sheet to surgical plan to operating room. Verification protocols exist precisely because transcription is a known failure point.
Intraoperative Technique and Complication Management
The occurrence of a recognized complication is generally not, by itself, a deviation. The standard of care speaks instead to recognition and response: identifying a posterior capsule tear, deciding whether the IOL can be safely placed, avoiding maneuvers that worsen the situation, and referring to a vitreoretinal colleague when lens material is lost posteriorly. A well-documented operative note that candidly describes a complication and its management is often the defense's strongest exhibit; a terse note silent on details the nursing record contradicts is a problem for any side relying on it.
Key point: A recognized complication, properly disclosed and properly managed, is not negligence. Deviation analysis asks whether each decision was reasonable when made — which requires the full record, not the outcome alone.
Postoperative Monitoring
Follow-up exists to catch the treatable complications: rising pressure, inflammation, wound leak, and above all endophthalmitis, where hours matter. Claims frequently turn on telephone triage — whether a patient reporting pain and decreasing vision was seen promptly. Records of calls, after-hours instructions, and the timing of each postoperative visit deserve close reading.
Limits of the Analysis, and What to Provide
An honest standard-of-care opinion is bounded by the record. Where documentation is missing or ambiguous, the opinion should acknowledge it rather than fill gaps with assumption. Counsel should provide the complete perioperative chart — preoperative notes, biometry printouts, consent, operative and nursing records, every postoperative visit, and phone logs — ideally organized as described in what records to provide. Related fact patterns are discussed on the cataract surgery expert witness and intraocular lens complications pages.
Frequently Asked Questions
What is the standard of care for cataract surgery?
It is the care a reasonably careful ophthalmologist would provide in similar circumstances, judged at each stage: appropriate indications, adequate informed consent, reliable biometry and IOL selection, competent surgical technique with proper management of any complication, and timely postoperative monitoring. It is not a guarantee of a good outcome.
Is a wrong IOL power always a breach of the standard of care?
Not always. Some refractive misses reflect the known limits of measurement, particularly in unusual eyes such as those with prior LASIK. A transcription error or failure to verify the lens in the operating room is a different matter. The distinction lies in the biometry records and verification documentation.
How is informed consent evaluated in a cataract case?
By looking at the whole documentation, not just the signature: whether the material risks and alternatives were discussed, whether patient-specific risks were addressed, and — for premium lenses — whether expectations were realistically framed. Clinic notes describing the conversation often matter more than the form itself.
Educational information only. This page provides general information for attorneys and other medical-legal professionals. It is not medical or legal advice, does not address any particular case, and does not create a physician-patient, attorney-client, or expert-client relationship. Opinions in any matter are formed only after review of the specific records, examination findings, and applicable literature. Past engagements do not guarantee any result.
Board-certified ophthalmologist; Adjunct Associate Professor of Ophthalmology, Keck School of Medicine of USC; active California Qualified Medical Evaluator. Full biography · Curriculum vitae
Published August 2, 2026 · Last substantive review August 2, 2026 · Medical reviewer: Marc H. Shomer, MD, PhD, QME
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