Cataract is diagnosed after an examination with a slit-lamp or biomicroscope, which is usually done after application of eye drops to obtain dilatation of the pupil.
This thorough or "super eye-examination" usually takes one hour, but it enables the surgeon to decide on the indication of cataract surgery.
The treatment can be agreed on immediately afterwards.
The Iol Master from Zeiss uses laser interferometry to measure up to 2:/1000e mm.= 2 Mikron- the eyelenght. This data is used to calculate the dioptry of the implant lens.