Evaluation Of Visual Performance Of Continuous Range Of Focus Iols Using A Model Eye

This study aims to compare the visual performance of two continuous-focus intraocular lenses (IOLs), Synergy (DFR) and Odyssey (DRT).

ASUCA Eye Clinic SENDAI

A model eye with an axial length of 24.0 mm, corneal curvature of 7.4 mm, and a fourth-order spherical aberration of 0.20 μm was utilized. Pupil diameters were set at 2, 3, and 4 mm. Both 20.0D DFR and DRT IOLs were implanted, and a visual acuity chart was photographed at a distance of 63 cm, corrected for distance vision at infinity. The chart was imaged in 0.25D increments ranging from +2.00D to -4.00D.

Focal peaks were identified at 0D and -3.00D for Φ3mm, +0.50D and -2.00D for Φ3mm, 0D and -2.75D for Φ4mm, and 0D and -2.75D, 0D and -2.00D for Φ2mm (in DFR and DRT order). DRT demonstrated superior performance at Φ4mm, whereas DFR performed better at Φ2mm. The depth of focus, defined as the range within which logMAR visual acuity remained ≤0.1, was 0.30D and 0.75D at Φ3mm, 0.40D and 0.50D at Φ4mm, and 0.60D and 1.10D at Φ2mm.

DFR provided superior near visual acuity, while DRT exhibited a more distant visual acuity peak that shifted further with increasing pupil diameter. Additionally, DRT demonstrated a slightly broader far visual acuity peak.