Preoperative evaluation of the cataractous patient.

The author reviews the methods and considerations involved in evaluating the cataractous patient. A well documented work-up is essential both to determine the need for surgery and to be able to inform the patient of possible outcomes. Many subjective factors influencing the decision to operate are also taken into account. The decision must be made on the basis of the work-up, a complete evaluation of the patient's complaints, lifestyle, and needs, and consideration of the risk factors involved. Indications and contraindications for intraocular lens implantation are examined. The subject of calculating lens power is covered in detail. The use of endothelial cell counts is also examined.