Evaluation of a Bi-Toric Trifocal Multifocal IOL
Purpose
Clinical evaluation of near, intermediate and distance visual acuity with a new bi-toric, trifocal multifocal intraocular lens for the correction of corneal astigmatism in presbyopic cataract surgery.
Methods
In a prospective study we evaluated the functional outcome of cataract patient’s receiving a bi-toric, trifocal multifocal intraocular lens (AT LISA toric multifocal MIOL, Carl Zeiss Meditech) 3 month after surgery. Examinations included UDVA (ETDRS 4m), UIVA (ETDRS 80cm), UNVA (ETDRS 40cm) as well as CDVA, DCIVA and DCNVA [logMAR] in the same distances. Additionally we performed visual acuity testing’s in set and individual distances (uncorrected and distance corrected) with the use of the Salzburg Reading Desk.
Results
Median binocular UDVA was -0.08, UIVA was –0.12 and UNVA 0.00 compared to a CDVA of -0.10, a DCIVA of -0.12 and a DCNVA of -0.06 [logMAR]. Regarding the Salzburg Reading Desk evaluation a binocular, objective UNVA (39.4 cm) of 0.11 similar to a subjective UNVA (38.9cm) could be found. Fort he intermediate range the objective UIVA was 0.09 (80.0cm) compared to a subjective UIVA of 0.03 (78.2cm).
Conclusion
The bi-toric, trifocal multifocal intraocular lens offers a high amount of spectacle independence for daily tasks. Small postsurgical refractive errors can be balanced by the wide range of focus of those types of lenses.