2020–2021 BCSC Basic and Clinical Science Course™
11 Lens and Cataract
Chapter 8: Optimizing Refractive Outcomes of Cataract Surgery
Presbyopia Correction
EDOF IOLs
EDOF IOLs are a class of presbyopia-correcting IOLs that can have various potential mechanisms of action. The FDA has approved 1 EDOF IOL for use in the United States; this IOL is also available in a toric model.
Instead of 2 distinct focal points, the aspheric EDOF IOL uses diffractive optics to create an elongated focal range and chromatic aberration reduction to improve contrast sensitivity (Figs 9-6, 9-7). It provides a range of vision from distance through intermediate, with a low level of dysphotopsias such as glare and halos. Some surgeons employ mini-monovision with this IOL, setting the nondominant eye for mild residual myopia (eg, −0.50 D) and the dominant eye for emmetropia. These adjustments can enable the EDOF IOL to provide better near vision in the nondominant eye.
The advantages and disadvantages of EDOF IOLs are similar to those of MFIOLs (discussed in the previous section), including some loss of contrast sensitivity. As with MFIOLs, patient selection and counseling are critically important.
Excerpted from BCSC 2020-2021 series: Section 11 - Lens and Cataract. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.