Temporary changes of visual outcomes and anterior chamber parameters after phacoemulsification and low-add-power segmented intraocular lens implantation for primary angle closure disease

Abstract

To evaluate the temporary changes in visual outcomes and anterior segment parameters after cataract surgery plus low-add bifocal intraocular lens (IOL) implantation for primary angle closure disease (PACD). This retrospective comparative case-control study included two groups: low-add-power segmented IOL and monofocal IOL. Postoperative examination involved evaluation of uncorrected distance visual acuity (UDVA), uncorrected near visual acuity (UNVA), uncorrected intermediate visual acuity (UIVA), and spherical equivalent (SE). Anterior segment examination was performed using anterior segment optical coherence tomography. This study included 19 eyes of 11 consecutive patients who underwent cataract surgery. The low-add group had better UDVA than the monofocal group at 3months postoperatively, better UIVA at 1month postoperatively, better UNVA at 1week postoperatively. In the low-add group, SE increased at 1 and 3months postoperatively compared with 1week postoperatively. In the monofocal group, objective SE decreased at 1 and 3months postoperatively compared with 1week postoperatively. In the low-add group, the anterior chamber depth (ACD) became significantly deep gradually at 1 and 3months compared with at 1week postoperatively. In the monofocal group, the ACD became significantly shallow gradually at 1 and 3months than at 1week postoperatively. The low-add-power segmented IOL achieved better far and intermediate distance visual acuity after cataract surgery in PACD patients than did the monofocal IOL. The ACD became deeper and SE showed a hyperopic shift with the low-add-power segmented IOL at 1 and 3months after cataract surgery compared with at 1week after cataract surgery.