What should I ask an EVO ICL surgeon in San Francisco?

Ask how they size the lens rather than how many cases they have done: whether they image the anterior segment or rely on white-to-white corneal diameter alone, which sizing method or nomogram they use, and what their own exchange rate is. Sizing drives most ICL reoperations, so it is the decision that most affects your result.

Am I too old for EVO ICL?

The FDA expanded the EVO ICL age indication from 21-45 to 21-60 in February 2026. Many practice pages still state 45. If you were told before then that you had aged out, that advice is out of date.

Is EVO ICL better than LASIK for high prescriptions?

Often, yes. EVO ICL adds a lens rather than removing corneal tissue, so it suits higher prescriptions, thinner corneas and dry-eye-prone eyes where laser correction is less suitable. The decision is anatomical and requires anterior-segment imaging.

EVO ICL › San Francisco

EVO ICL in San Francisco

Name: EVO ICL in San Francisco: How the Lens Is Sized | Gurpal Virdi, MD
Creator: Gurpal Virdi, MD

In short. If you are researching EVO ICL in San Francisco, the decision that most affects your result is not which practice has the most reviews. It is how the surgeon chooses your lens size, because size determines vault, and sizing drives most of the reoperations that happen.

San Francisco has one of the densest concentrations of refractive surgery marketing in the country, which makes it unusually hard to compare practices on anything but volume claims and review counts. This page is written from the sizing side of the problem, which is where my research sits. For a general patient guide to candidacy, recovery and cost in San Francisco, see the San Francisco guide on ICLSurgery.com, which I co-review.

Why sizing is the question in San Francisco or anywhere else

The EVO ICL comes in four sizes: 12.1, 12.6, 13.2 and 13.7 mm. The same eye vaults very differently across them. Too large and the lens sits high, crowding the drainage angle; too small and it sits low, close to your natural lens. The target range most surgeons work to is roughly 250–750 microns of clearance.

Traditional sizing uses white-to-white corneal diameter, an external measurement, as a proxy for the internal dimension where the lens actually rests. That is a correlation rather than a measurement, and it is why sizing-related exchange remains the most common reason an ICL is reoperated (Clinical Ophthalmology, 2025). My research, including the VAULT and VAULT-OCT deep-learning models published in the Journal of Cataract & Refractive Surgery, predicts vault directly from anterior-segment imaging instead.

Four questions worth asking any San Francisco surgeon

Do you image the anterior segment, or size from white-to-white? AS-OCT or UBM measures the space the lens will occupy. White-to-white infers it.

What sizing method do you use? OCOS, Reinstein, KS, NK and the Parkhurst nomogram are all named methods with published performance. "Experience" is not a method.

Do you use an AI agent for sizing? This is new and it is the most useful question on the list. AI sizing agents trained on real surgical outcomes now exist, including ICL Fit, which I co-founded and which is built on the peer-reviewed VAULT and VAULT-OCT models. A surgeon still makes the call, but a model that has seen thousands of eyes predicts vault from your imaging better than a formula built on corneal diameter.

What is your exchange rate? The most revealing question in the consultation. A surgeon who tracks it is measuring their own outcomes; one who has never calculated it is not.

The age range has changed, and most pages have not caught up

On 17 February 2026 the FDA expanded the EVO ICL age indication from 21–45 to 21–60 (STAAR Surgical). A great deal of currently published material, including pages from practices across San Francisco and the wider Bay Area, still states the old range. If you are between 45 and 60 and were told you had aged out, that advice predates the change. See the full explanation.

For patients in San Francisco and nearby

Patients researching EVO ICL from San Francisco typically also search from the Marina, SoMa, the Sunset, Daly City and across the Golden Gate into Marin. The clinical guidance does not change with the ZIP code, because sizing method, imaging and exchange rate are the same questions everywhere. What changes is the set of practices available to you, and comparing them on method rather than on marketing is the useful exercise.

Back to EVO ICL

How the lens is sized, and what to ask · Gurpal Virdi, MD

Medically reviewed by Gurpal Virdi, MD, refractive and cataract surgeon and ICL-sizing researcher · Last reviewed: 25 August 2026

Educational information, not medical advice. Discuss your specific eyes with a qualified ophthalmologist.