Low Asti: Assessing the astigmatism reducing effect with toric IOLs in eyes with low astigmatism

With increasing demands of patients concerning refractive outcome after cataract surgery, toric intraocular lenses (IOLs) that correct corneal astigmatism have been introduced more widely to cataract surgery. Since a couple of years, toric IOLs are available from numerous manufacturers to correct moderate amounts of astigmatism. However, there is still uncertainty, if low astigmatism should be corrected since in eyes with low corneal astigmatism the accuracy of measuring the astigmatism meridian is relatively low and different corneal measurement techniques are not always comparable. Hence, we want to assess, if toric IOLs are useful in patients with low amounts of corneal astigmatism and to quantify the sources of error in toric IOL power calculation.