Distance and near vision was equivalent with the two lenses, but the Synchrony provided significantly better binocular intermediate vision at 60 cm.

A subjective perception of glare and halos at night was more common in the Acry Sof Restor group.

Chromatic aberration reduces image quality in normal white light because each of its color wavelengths refracts differently.

The Tecnis Multifocal IOL is made of an acrylic material with chromatic aberration, which is better than that of the crystalline lens.

The mechanism of accommodation is similar to that of the Crystalens, which moves anteriorly when the zonule relaxes with accommodative effort and thus increases its effective power and reduces myopia (Figure 3).

The challenge with any IOL is to obtain the correct refractive power.

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The next generation of IOLs is bringing us closer to the goals of perfect refractive results and excellent accommodative amplitudes for patients.

The Synchrony has an anterior optic with a high plus power and a posterior optic with a high negative power (Figure 1).

The dual-optic design yields a power that is equivalent to that of a standard IOL.

Because of the dual optics, implanting the Synchrony lens is like placing two IOLs simultaneously, which makes it more difficult to insert than standard IOLs.

Also, the eye tends to be myopic after the lens’ implantation and to have a variable drift toward emmetropia as the capsular bag heals.

Theoretically, 1.5 mm of separation should result in about 3.50 D of accommodation.