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Refractive Lens Exchange & Premium Lenses

Monofocal Lens Implants

A monofocal lens implant focuses at a single distance, usually far, and gives the sharpest, highest contrast vision of any lens with no halos. Reading glasses are used for near. It is the lens Medicare and insurance cover for cataract surgery, the right choice for patients who do not mind readers or who have eye conditions that argue against multifocal optics, and, set as blended vision between the eyes, a way to reduce readers without splitting light.

Medically reviewed by Dr. Bavand Youssefzadeh, DO

Vision provided
One distance, usually far
Contrast and halos
Best contrast; no halos
Readers
Yes, for near work
Insurance
Covered for cataract surgery

What a monofocal lens does well

Because all the light goes to one focus, a monofocal lens delivers the crispest image and the best contrast sensitivity, and it produces none of the rings around lights that multifocal lenses can. It is also the most forgiving lens: a small residual prescription or a slightly imperfect macula affects it less than it affects a lens that depends on splitting light precisely. For those reasons it remains a widely used choice.

Who chooses a monofocal

  • Patients content to wear reading glasses, particularly those who have always worn them
  • Patients with macular degeneration, diabetic eye disease or significant corneal irregularity, where a multifocal would underperform
  • Patients who drive professionally at night or who prize contrast and visual purity
  • Patients having cataract surgery under insurance who prefer not to pay for a premium lens
  • Patients whose surgeon recommends the predictable option in a complex eye

Blended vision with monofocal lenses

Setting the dominant eye for distance and the other eye slightly nearsighted, called monovision or blended vision, lets many patients read menus, phones and labels without glasses while keeping monofocal optics. It is trialed with contact lenses beforehand where possible, because a minority of people dislike the imbalance. It reduces dependence on readers rather than eliminating it, and is a common, honest middle path.

Enhanced monofocal lenses

A newer class of monofocal, such as the Tecnis Eyhance, modifies the optic to extend focus slightly into the intermediate range without diffractive rings, improving vision at arm's length while keeping monofocal contrast and clarity. It is a small but useful step up for patients who want better computer and dashboard vision without moving to an EDOF or multifocal design.

Toric monofocals

Monofocal lenses come in toric versions that correct astigmatism, so a patient with astigmatism can have clear distance vision without glasses and use readers for near. This combination is a widely used option.

Is this right for your eyes?

Nothing on this page is a diagnosis. Whether this is the right choice for you is decided by a full examination at one of our 4 offices: Pasadena, Huntington Beach, Woodland Hills and Beverly Hills.

About this content: This page was written with the assistance of AI tools and reviewed for medical accuracy by Dr. Bavand Youssefzadeh, DO. It is general information, not medical advice, and does not replace an eye examination. Individual results vary. Read our medical disclaimer.

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Frequently Asked Questions

Yes. Some patients who read for a living or have always been nearsighted prefer to keep near vision and wear glasses for distance. The choice is discussed at the evaluation.

It is different. For image quality and contrast it is the best lens; for glasses independence it is the least. Which matters more to you is the question the evaluation asks.

Exchange is possible but is a second operation with its own risks. It is better to make the choice carefully the first time.

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