Performing a manual capsulorhexis, although requiring skill, does not always result in a perfectly round opening in the capsule. Often, a slightly oval capsulotomy is not a major issue. However, there are instances where this is not the case and a perfectly circular capsulorhexis is required.
Indeed, the use of multifocal and toric lenses necessitates a perfectly round and well centred capsulotomy. In other incidences, such as opaque corneas or white milky hypermature cataracts, creating a rhexis can become challenging due to poor visibility or high intracapsular pressure.