Visual Performance of Defocus Incorporated Multiple Segments With Triple Enhanced Design Spectacle Lenses Versus DIMS and Single Vision Lenses

Purpose: To compare short-term visual functions changes in myopic children who had worn the defocus incorporated multiple segment (DIMS), DIMS with triple enhanced design (DIMS TED), and single-vision (SV) spectacle lenses. Methods: Thirty-eight Chinese children (six to 13 years) with spherical equivalent refractive error -1.00 D to -5.00 D were recruited. Participants wore DIMS, DIMS TED and SV spectacle lenses in random order. High- and low-contrast distance and near visual acuity (VA), mid-peripheral near VA, binocular functions, accommodation and visual symptoms were assessed before and after 1-week of lens wear, while mid-peripheral distance VA was assessed with and without glare in a second visit. Results: Most visual functions showed no differences before and after lens wear. Central high- and low-contrast distance VA and central high-contrast near VA under room and dim lighting were unaffected by DIMS and DIMS TED spectacle lenses compared to SV lenses (all P > 0.05). Central low-contrast near VA was reduced by 0.06 ± 0.10 logMAR in DIMS TED lenses compared to DIMS lenses under room lighting (P < 0.01), and by 0.06 ± 0.11 logMAR compared with SV spectacle lenses under dim lighting (P < 0.01). Mid-peripheral distance VA and near VA were reduced by approximately 0.10 logMAR in DIMS TED and DIMS compared to SV lenses (P < 0.01), respectively. However, these reductions are unlikely to represent a clinically meaningful impairment in visual function. Most children adapted and accepted the DIMS TED spectacle lenses well. Conclusions: DIMS TED spectacle lenses demonstrated visual performance comparable to DIMS and SV spectacle lenses. Translational Relevance: The enhanced design of the DIMS TED spectacle lenses maintains visual performance comparable to DIMS and single vision spectacle lenses, and may potentially increase myopia control efficacy.