A monofocal intraocular lens (IOL) replaces the cloudy natural lens during cataract surgery and is designed to give its clearest focus at a selected distance. Many patients choose distance vision and use reading glasses afterward, but the intended target should reflect your needs and eye measurements.
Distance, computer, and reading vision
If a monofocal implant is targeted for distance, activities such as driving and watching television may be clearer without prescription distance glasses, but close tasks often still require readers. If targeted for near vision, the opposite tradeoff applies. Outcomes vary, and some people still need glasses to sharpen vision at the chosen distance.
What is monovision?
With monovision, one eye is typically targeted more toward distance and the other toward near or intermediate vision. It can reduce dependence on glasses for some people, but may affect depth perception or visual comfort. A discussion of prior experience with monovision, and sometimes a contact-lens trial, can be useful.
Can a monofocal lens correct astigmatism?
A standard spherical monofocal IOL does not correct significant corneal astigmatism on its own. Toric monofocal lenses have an astigmatism-correcting component, and additional charges may apply. Accurate measurements and correct alignment are important.
How does it compare with premium implants?
Monofocal lenses generally offer fewer distinct focal ranges than multifocal or EDOF designs. They are often favored when a clear single focus and fewer lens-related halos are important. No choice eliminates all potential optical symptoms or guarantees freedom from glasses.
Cost and insurance
Medically necessary cataract surgery with a conventional monofocal IOL is generally covered under Medicare subject to relevant deductibles and coinsurance. Enhanced refractive corrections may create charges beyond covered surgery. Ask for a written estimate of covered and noncovered services; see our cost and insurance guide.
Questions to ask before choosing
- Should we target distance, intermediate or near vision?
- How much reading-glasses dependence should I expect?
- Is monovision suitable given my work and depth-perception needs?
- Would a toric lens be beneficial for my astigmatism?
- Are any eye diseases likely to limit my final vision?