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This abstract is assigned to session Poster session in O'Bistro

Title

The continuing quest to perform accurate IOL calculations in cataract surgery.

Purpose	Purpose: To evaluate the accuracy of intraocular lens (IOL) calculations with the LENSTAR®
Methods	Methods: Design: Retrospective, case series. Participants: 30 patients who underwent phacoemulsification + intraocular lens implant. Intervention: All patients were evaluated preoperatively with objective refraction(OR), axial length based on ultrasonography(AXL) and LENSTAR®. On the one hand, IOL was calculated based on AXL and OR and on the other hand,the three calculated IOL’s of the LENSTAR® were documented. The difference (D) between the chosen IOL and the calculated IOL was noted for all methods. Patients were seen the first postoperative day and one month after surgery. Their best corrected visual acuity (BCVA) and OR were documented on each visit. Finally, we compared the documented D with the OR of the patients. Main outcome measures: BCVA and OR after IOL calculation with LENSTAR® after 1 month of follow up.
Results	Results: The preliminary results show that the calculation based on the Haigis method is the most accurate. In most cases the difference between the chosen IOL and the calculated IOL by this method is almost neglectable, whereas in other formulas, the difference is more notable. Statistical analyses will be illustrated on the poster.
Conclusion	Conclusion: The preliminary results illustrate a very good accuracy of the IOL calculations with LENSTAR®, with the Haigis Formula in particular.

Author 1

Last name	DEBROUWERE
Initials	V
Department	UZ Leuven, campus Sint-Rafaël; Jan Yperman ziekenhuis
City	Leuven; Ieper

Author 2

Last name	Blanckaert
Initials	J
Department	UZ Leuven, campus Sint-Rafaël; Jan Yperman ziekenhuis
City	Leuven; Ieper

Author 3

Last name	Mulliez
Initials	E
Department	Jan Yperman ziekenhuis
City	Ieper