Measuring the Intraocular Lens in Cataract Patients with Retinal Disease

Abstract

Cataracts are one of the most common problems in ophthalmology. One of the most effective treatments is a surgery to remove cataract and replace it with the intraocular lens (IOLs). The IOLs power calculation is essential for the success of the surgery. To calculate the power of the IOLs, the biometry of the eye is required. One of the most important ocular biometric parameters is the axial length. It is the measurement from the anterior corneal vertex to the retina. However, there are some cataract patients who presented with retinal disease that can affect the axial length measurement, such as epiretinal membrane, macular hole and retinal detachment. Thus, it will result in the miscalculation of the IOLs power and suboptimal postoperative visual outcomes. The most common devices currently being used to measure ocular biometry are the IOL master 500® and IOL master 700®. Measuring Axial length with the IOL master 500® has only one point where light is reflected the highest, which corresponds to the RPE layer in the retina. For the IOL master 700®, the green line that reads the axial length must be matched with the RPE layer in the retina by observing the side image. The purpose of study is to investigate techniques for measuring axial length in patients with cataracts and retinal disease.