Questions to Ask an Ophthalmology Expert Witness at Deposition (2026 Guide)

By John Mahoney · Updated 2026-09-01 · 18 questions in 4 concession chains

You are about to cross-examine someone with two decades of training you don't have, on their home turf, about the thing they do every day. That asymmetry is the defining problem of medical-expert depositions — and it gets worse in multi-defendant malpractice cases, where two to four different specialties can be in play in a single case and you have to be conversant in all of them by deposition day.

Ophthalmology experts testify on delayed treatment of acute vision loss, glaucoma-monitoring failures, and post-procedure infections. Vision-loss cases are window cases — some causes are treatable only briefly — and the specialty’s objective testing gives you data the expert cannot re-interpret freely.

The answer to the asymmetry is not to learn ophthalmology — it is structure. A concession funnel asks the expert to agree, one fact at a time, to propositions so orthodox that refusing them costs more credibility than granting them. The questions below are a generic-case-safe starting bank, organized into the four chains that structure works through.

How to use these questions

Every question below follows three rules of expert cross-examination: it is leading (it states a fact and asks for agreement), it contains one fact (no compounds — a compound question lets the witness answer the easy half), and it belongs to a concession chain (each answer narrows the room the next answer can live in). Ask them in order. When you get the concession, stop — do not ask the "why" question that lets the expert explain it away.

Chain 1 — Qualifications, retention & scope

Goal: establish on the record that this is a paid, retained witness who never touched the patient, and fix the boundaries of what they actually practice.

Doctor, you were retained by opposing counsel in this case, correct?
You are being compensated for your time reviewing this case and for your testimony today, correct?
You never examined or treated the patient in this case, correct?
Everything you know about this case comes from the materials counsel selected and sent to you, correct?
Ophthalmology generates objective test data — imaging, visual fields, pressure measurements — that exists independent of anyone’s recollection, correct?

Chain 2 — Bases-of-opinion lockdown

Goal: freeze the universe. After this chain, any new document, new basis, or new opinion at trial is impeachment material.

You have now told us every document and material you reviewed in forming your opinions, correct?
You are not relying on anything outside that file for the opinions you will give in this case, correct?
You have told us every opinion you intend to offer at trial, correct?
You agree that an opinion you cannot state to a reasonable degree of medical probability is speculation, correct?

Chain 3 — Substantive concessions: vision loss, monitoring, and post-procedure infection

These concessions frame the treatment-window and monitoring failures that ophthalmology cases turn on, without touching a single contested number.

Acute vision loss requires urgent evaluation, correct?
Some causes of vision loss are treatable only within a limited window of time, correct?
That is why the timing of evaluation matters, correct?
Glaucoma management includes monitoring over time, correct?
Infection inside the eye after a procedure is an emergency, correct?
The visual-field and imaging tests in this case are objective data, correct?

Chain 4 — Closing the doors

Goal: end with the record sealed. These questions convert silence into a commitment that nothing new is coming at trial.

You are not offering any opinions in this case beyond the ones we have discussed today, correct?
You have not held back any opinion or criticism that you intend to offer at trial, correct?
You are not offering any opinion about the primary-care physician’s referral decisions in this case, correct?

These are the generic questions. Your case isn't generic.

The MedLegal AI Examination Builder generates a complete, case-specific concession-funnel roadmap for deposing an ophthalmology expert — built from your theory of the case, aware of which side you're on and what kind of witness you're facing, with stop markers, if-they-resist branches, and the doors you should not open. Three free cases, no credit card.

Build my examination → Ophthalmology depo trainer

Where lawyers get burned deposing ophthalmology experts

Fighting the treatment window before locking the presentation clock

Window-based causation defenses depend entirely on when the clock started. Lock every documented time — symptom report, call, visit, referral — before any question about whether treatment would have worked. An expert who has committed to the timeline has far less room on causation.

Accepting "the patient missed appointments" without examining the recall system

Glaucoma and retina patients need scheduled surveillance, and no-shows are real — but so are practices with no recall system. Establish what the practice did when the patient missed: was a letter sent, a call made, the risk documented? Surveillance is a shared duty, and the chart shows who carried theirs.

Letting the expert average visual outcomes

Experts generalize — "most patients with this condition do poorly." The objective serial data in this patient’s own record is stronger material. Walk the patient’s documented fields and pressures over time and make the expert address this eye, not the average one.

FAQ

What questions should I ask an ophthalmology expert witness at deposition?

Work in four concession chains: (1) qualifications, retention, and scope — establish the expert was retained, is compensated, never treated the patient, and what they do and do not practice; (2) bases-of-opinion lockdown — pin every document reviewed and every opinion they intend to offer; (3) the ophthalmology-specific substantive chain — well-established propositions such as "Acute vision loss requires urgent evaluation"; and (4) closing the doors — confirm on the record that no undisclosed opinions remain. Every question should be leading, contain one fact, and build on the prior answer.

How do I cross-examine a medical expert when I never went to medical school?

You don't out-doctor the doctor — you build concession chains from propositions so well-established that a credible ophthalmology expert cannot refuse them, then apply those concessions to the facts in the chart. The expert's medical training becomes your asset: the more orthodox the proposition, the more it costs them to fight it. The asymmetry problem is real — especially in multi-defendant cases with two to four specialties — which is why the questions are organized as funnels rather than as debates.

What are the biggest traps when deposing an ophthalmology expert witness?

The classic traps are arguing treatment-window causation before locking the presentation timeline, accepting patient no-shows as a defense without examining the practice’s recall system, and letting the expert substitute average outcomes for this patient’s own serial objective data.

Related resources

Examination Builder — a case-specific concession-funnel roadmap from your theory of the case
Ophthalmology deposition trainer — the other side of the table: how ophthalmology witnesses are prepped against these questions
All specialties — deposition question guides
Are you an ophthalmology physician? Join the MedLegal AI expert network

This page is informational only and is not legal advice. Question banks are generic-case-safe starting points — adapt every question to the facts, the jurisdiction, and your theory of the case before using it in a deposition.