ArcScan: To assess if using a high resolution immersion ultrasound measurement improves intraocular lens power calculation

Immersion ultrasound can be used to calculate the needed power of an intraocular lens (IOL) to achieve the aimed post-operative refraction. Although IOL power calculation improved within the last decades, refractive surprises occur. The estimation of the postoperative IOL position and therefore the estimated anterior chamber depth (ACD) is presently the main source of error in IOL power calculation. The ArcScan Insight 100 scanner is an immersion ultrasound device to create high resolution B-scans (=images) of the anterior segment of the eye. Aim of this study is therefore to assess if the additional use of high resolution immersion ultrasound measurements improve the refractive outcome after cataract surgery.