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Cataract Visual Simulator

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Presbyopia correcting lenses

Multifocal: Vivity Extended Vision, PanOptix Trifocal, Tecnis Multifocal, Restor Multifocal

Until very recently, people who underwent cataract surgery received a monofocal (single vision) lens. This type of lens could only correct either distance or near vision. This meant patients must continue to wear glasses or bifocals for daily tasks like reading labels at the grocery store, newspapers, computer screens and medicine bottles.

However multifocal lenses designed to both replace cataracts and correct both distance and near vision. This lens uses the technology known as apodization, refraction and diffraction and has been used in microscopes and telescopes to improve image quality.

Studies demonstrated that in patients who had multifocal lenses in both eyes, no glasses were needed for driving, reading, using the computer, applying makeup, or shaving in the vast majority of patients. Studies also demonstrated that patients were so satisfied with their vision that 95% indicated they would have the procedure again.

The material that the multifocal lenses are made is the same material doctors have been using since the early 1990’s. The side effect profile of the multifocal lenses is very similar to that of traditional monofocal IOLs. However, there is a greater chance of having significant halos or glare compared with a monofocal lens. In less than 1% of the patients the glare was troublesome enough that the patients requested that their IOLs be removed.

No current technology can eliminate glasses, and how well you will perform with multifocal lens implants can vary because of individual factors. Nevertheless, they are an excellent option for patients who already need cataract surgery who want to decrease their reliance upon glasses. While multifocal implants carry no guarantees, they should greatly improve the odds that you will be able to read and see better overall without glasses.

Not everyone is a candidate for this lens. Please inquire for more about your eligibility and the cost if you are interested in this technology!

Cataract Visual Simulator

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Extended Depth of Focus (EDOF)

Extended Depth of Focus (EDOF), or Extended Range of Vision lenses, use diffractive optics to creatie a single elongated focal point to improve the “range of vision” or “depth of focus”. They provide a continuous range of vision from distance to near seamlessly, not requiring any thought from the patient. There is no learning curve needed, unlike the learning process a person goes through when first wearing bifocal or progressive spectacles. They uses proprietary optic technology to create high quality vision across a range from distance to about 26 inches away. The result is high quality vision, without glasses, across a wide range of distances.

Depending on pupil size, the EDOF IOL patient may be subjected to some halos, glare or starbursts around lights at night. These disturbances are different from and much less challenging than those typically caused by cataracts. These halos become less conspicuous and disturbing over time as the brain understand to selectively disregard them through a process called neuroadaptation. This is the same process that allows us to ignore background sounds such as traffic sounds or an air conditioning fan. How quickly these adjustments are made by the brain varies for different individuals. Experience has shown that neuroadaptation is a ongoing process that occurs over several months. Halos are often quite noticeable during the first 24 hours after surgery when the pupil is still dilated from medication. Do not be alarmed or misled by this temporary situation. Compared to their predecessors, the current EDOF IOLs have been engineered to significantly reduce the halo effect.

Not everyone is a candidate for this lens. Please inquire for more about your eligibility and the cost if you are interested in this technology!

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Astigmatism correcting lenses


Astigmatism is a common condition that can make your vision distorted or blurred. The distortion is usually because the eye’s cornea or lens has an oval instead of the preferred round shape. It is a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus.

A standard lens implant can be set to make you either far sighted or near sighted but if you have astigmatism, your focus without glasses will still be blurred to some degree because of the residual astigmatism that is not corrected by the standard lens implant. Eliminating your astigmatism will reduce your dependence upon glasses as compared to if you had a standard lens implant.

Patients with moderate or high degrees of astigmatism almost always experience blurred or distorted vision unless the astigmatism is corrected. This is accomplished with corrective lenses (glasses or contact lenses) prior to cataract surgery. In some cases, patients do not realize they have astigmatism prior to cataract surgery because the cataract masks the astigmatism; but in this case, when the cataract is removed, it will become apparent.

At the time cataract surgery is performed, a TORIC lens can be placed into the eye. Unlike the standard lenses used in cataract surgery, they contain an additional correction power used to neutralize the irregularity in the cornea. Single vision toric lens implants usually do not entirely eliminate eyeglasses. Most patients who have toric lens implants in both eyes will not have to wear glasses for distance activities but they would be expected to wear glasses for near. There is the option to set both eyes for near with the toric lens and wear glasses for distance or even one eye for distance and one eye for near (monovision). There also presbyopia correcting toric lenses available as well that can greatly reduce the need for reading glasses.

LASIK surgery can also be utilized to correct astigmatism but is significantly more expensive and is an additional procedure that cannot be performed at the same time as cataract surgery and carries additional risks, while the toric lens implant is placed in the course of the cataract surgery and carries almost no additional risk.

Not everyone is a candidate for this lens. Please inquire for more about your eligibility and the cost if you are interested in this technology!

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