How long does neural adaptation to multifocal lenses typically take?
Neural adaptation, the process by which the brain learns to select the correct focal zone, generally takes anywhere from a few weeks to a few months. Most patients report that visual quality continues to improve gradually throughout this adjustment period.
Are multifocal lenses suitable for patients with dry eye?
Significant dry eye can affect visual quality with any IOL, and this is particularly true with multifocal lenses, which depend on a stable tear film for optimal performance. PVI doctors will evaluate and, when necessary, treat dry eye prior to surgery to help maximize your outcomes.
Can multifocal lenses be implanted after a previous LASIK procedure?
Patients who have had prior LASIK or PRK can still be candidates for multifocal IOLs, though the pre-surgical measurements require additional adjustments to account for the reshaped cornea. Our surgeons’ experience in both refractive surgery and lens implantation makes her particularly well-suited to evaluate and treat this patient population.
What causes the halos and glare some multifocal lens patients experience?
Halos and glare result from the multiple optical zones of the lens bending light simultaneously, creating visual artifacts — especially around bright lights at night. For most patients, these symptoms decrease significantly as neural adaptation progresses over weeks to months.
Is one brand or model of multifocal lens better than others?
Multiple well-studied multifocal IOL platforms are available, each with optical designs tailored to specific visual needs and lifestyles. Our surgeons select among the available options based on each patient's ocular measurements, visual priorities, and history.
What if I am unhappy with my multifocal lens results?
While most patients are satisfied with their outcomes, a small percentage may experience persistent visual disturbances that affect quality of life. In these cases, options such as additional refractive procedures or, in rare circumstances, lens exchange can be explored with PVI surgeons.
Do multifocal lenses affect color vision or contrast sensitivity?
Some multifocal lens designs can slightly reduce contrast sensitivity compared to monofocal lenses, which may be noticeable in low-light environments. Most patients find this trade-off acceptable given the significant reduction in dependence on glasses, and advances in lens technology continue to narrow this gap.
Are multifocal lenses covered by Medicare or insurance?
The underlying cataract surgery is generally covered by Medicare and most insurance plans, but the premium multifocal IOL upgrade is an additional cost borne by the patient. Pacific Vision Institute's team will help you understand exactly what is and is not covered before your procedure.