Advance to primates
The next step in the development of the AD-IOL will be to confirm the results observed in bench studies in eyes of living primates. The AD-IOL procedure involves two stages. First, the lens is implanted in the bag by applying the same technique as for a standard monofocal IOL.
“The IOL is the same size as a regular IOL,” Dr. Beer said. “It is locked in a flattened, disaccommodated configuration.”
After allowing four to six weeks for the capsule to collapse, fibrose, and adhere to the haptics, the IOL is unlocked. Radial capsulotomies are created in a non-invasive procedure using a laser (Nd:YAG or femtosecond), releasing optic mobility.
Research conducted with the first version of the accommodating IOL, designed to achieve axial shift with accommodation/disaccommodation, proved that the zonular capture haptics could convert zonular force into optic movement. However, as expected, the axial-shifting AD-IOL exhibited a limited range of accommodation.
“Zonular-capture haptics is an enabling technology that can be used in different ways,” Dr. Beer explained. “The dual-mode AD-IOL is designed to achieve both axial shift and an optic shape change with a system that can work in a closed and fibrosed capsular bag to achieve at least 15 D of accommodative change in the eye at the same force level as the previous model.”