A cataract surgery evaluation is a comprehensive preoperative examination that involves various measurements of the eyes, assessing the visual acuity, dilating the pupils in order for the doctor to assess the degree of cataract and overall eye health, viewing an informative video that discusses cataract surgery and having an open discussion with the doctor to review the procedure, risks and alternatives of surgery. If the doctor and the patient both elect to proceed with cataract surgery, preoperative surgical paperwork is also reviewed during this visit. The full consultation typically takes two and a half to three hours to complete.
The preoperative measurements obtained during a cataract extraction evaluation are important for the doctor to select an appropriate intraocular lens power to insert during cataract surgery. The measurements include keratometry (curvature of the cornea) and optical coherence biometry using a Zeiss IOL Master®. A Bausch & Lomb OrbScan II® corneal topographer may also be used to capture a detailed topographical map of the cornea. Computerized lens power formulas are calculated, analyzed and compared to allow the doctor to select the most appropriate power intraocular lens (IOL) to insert during cataract surgery.