Small Aperture Lenses in San Francisco | Pacific Vision Institute

Expanding Access to Clear Vision at Pacific Vision Institute

At Pacific Vision Institute, our surgeons have always prioritized finding solutions for patients who fall outside the standard candidate profile for conventional vision correction. As the author of the first textbook on all-laser LASIK and a researcher whose work on corneal healing has earned international recognition, our surgeons bring both scientific depth and clinical creativity to every patient she treats, including those for whom standard IOL options have not delivered satisfying results.

What Are Small Aperture Lenses?

Small aperture IOLs, most notably the IC-8 Apthera lens, use the optical principle of pinhole imaging to extend the depth of focus and reduce sensitivity to optical imperfections. Embedded within the lens is a small, centrally located opaque ring with a tiny central opening, similar in concept to the pinhole effect used in cameras.

By allowing only a narrow, central column of light to reach the retina, small aperture lenses reduce the impact of higher-order aberrations and corneal irregularities that would otherwise compromise vision quality. The result is a broader, more forgiving depth of focus and a meaningful reduction in glare and halos.

Benefits of Small Aperture Lenses

Extended depth of focus through pinhole optics
Reduced sensitivity to corneal irregularities and higher-order aberrations
Meaningful reduction in halos, glare, and starbursts compared to some multifocal designs
Broader candidacy, suitable for some patients who are not candidates for standard premium IOLs
Reduced dependence on glasses across a range of distances
Stable, permanent correction with no maintenance required

Are You a Candidate for Small Aperture Lenses in San Francisco?

Small aperture lenses may be worth exploring if you:

Have corneal irregularities that disqualify you from other premium IOL options
Have experienced unsatisfying results with a standard or premium IOL in the fellow eye
Have higher-order aberrations that affect your quality of vision
Are particularly sensitive to nighttime glare, halos, or starbursts
Are undergoing cataract surgery and want an extended depth of focus without multifocal optics
Have dry eye or other conditions that make you a less-than-ideal candidate for conventional premium lenses

Dr. Faktorovich working on a patient's eyes

Why Choose Pacific Vision Institute for Small Aperture Lens Implants?

Small aperture lenses require the kind of nuanced patient selection and surgical precision that only comes with deep experience in both refractive optics and lens-based surgery. Our surgeons’ research background equips them to evaluate complex cases with a level of thoroughness few surgeons can match.

Their membership in the American Society of Cataract and Refractive Surgery and their role as Founder and Chair of the Annual San Francisco Cornea, Cataract, and Refractive Surgery Symposium reflect their ongoing commitment to staying at the leading edge of IOL technology.

What to Expect

Consultation and Preoperative Examination

Full ocular health evaluation and candidacy assessment
Extensive measurements of your eye’s optics and focusing system
Advanced 4-scan topography, ocular biometry, tomography, anterior and posterior segment OCT
Discussion of lens options tailored to your vision goals
Thorough discussion of financial options

Procedure Steps

Performed as part of cataract surgery or refractive lens exchange
Natural lens is removed using advanced ultrasound techniques
Extended range IOL is precisely implanted in the lens capsule
Procedure typically completed in under 30 minutes per eye

Recovery & Results Timeline

Initial vision improvement is often noticeable within the first few days
Full stabilization and adaptation typically within 4–8 weeks
Follow-up visits scheduled at 1 day, 1 week, and 1 month post-procedure
Some patients notice a brief period of dim or shadowed peripheral vision that resolves as the eye adapts

Schedule Your Small Aperture Lens Consultation in San Francisco

If you've been told you're not a candidate for premium lenses, or if previous lens options haven't delivered the vision you expected, Pacific Vision Institute may have an answer. Contact us today to schedule a consultation with our surgeons.

Frequently Asked Questions About Small Aperture Lenses

Will a small aperture lens work if I also have astigmatism?

The small aperture design is inherently more tolerant of astigmatism than conventional premium IOLs, making it a viable option for patients with mild to moderate corneal astigmatism. Our surgeons will assess your degree of astigmatism during your evaluation to determine whether additional correction is needed alongside the lens implant.

Is a small aperture lens implanted in both eyes?

In many cases, the small aperture lens is implanted in only one eye, typically the non-dominant eye, while a monofocal or complementary IOL is placed in the fellow eye. Our surgeons will evaluate your specific visual profile and determine the optimal bilateral strategy for your situation.

How does the pinhole effect work inside the eye without blocking useful vision?

The small central aperture of the lens filters out peripheral, aberrated light rays while allowing the central column of focused light to reach the retina clearly. Most patients adapt quickly and do not notice the opaque ring itself, as the brain learns to process the corrected central vision naturally.

Can a small aperture lens be combined with LASIK after surgery if I still need fine-tuning?

Yes — if residual refractive error remains after implantation, a surface laser treatment such as LASIK or PRK can be performed to refine the result. Our surgeons’ expertise across both refractive surgery and lens-based correction makes Pacific Vision Institute uniquely positioned to offer this combined approach.

Are small aperture lenses appropriate for patients with macular degeneration or other retinal conditions?

Patients with significant macular disease are generally not strong candidates for any premium IOL, including small aperture lenses, as the retinal condition limits the visual potential that any lens can provide. Our surgeons will perform a thorough retinal evaluation as part of your preoperative workup to determine whether this lens is appropriate for your eye health.

How does a small aperture lens differ from a standard extended depth of focus (EDOF) lens?

Standard EDOF lenses use diffractive or refractive optical engineering to stretch the focal range, while small aperture lenses achieve extended depth of focus through the pinhole principle — filtering light rather than bending it. This distinction makes small aperture lenses particularly valuable for patients with corneal irregularities who may not benefit from conventional EDOF optics.

Is the adaptation period longer with small aperture lenses than with other IOLs?

Some patients notice a brief period of adjustment — particularly in dim lighting — as the visual system adapts to the pinhole optic. This typically resolves within the first few weeks, and most patients report comfortable, stable vision well within the first two months following surgery.

Does the small aperture ring affect peripheral vision permanently?

The opaque ring is designed to sit outside the central visual axis, so it does not interfere with functional central vision. While some patients notice subtle changes in peripheral light perception early in recovery, this effect is generally not disruptive and diminishes as neural adaptation takes place.

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