This procedure is essentially the same as PRELEX except a fixed-focus lens (a monofocal lens) is implanted rather than a multi-focal lens. It is therefore the same procedure as that carried out for patients with cataracts Some patients are not suitable for PRELEX, but would benefit from removal of their natural crystalline lens and the insertion of a fixed-focus lens implant.
This group of patients includes those with specific refractive (optical) disorders, such as high myopia (short-sightedness).
Significant astigmatism might also preclude patients from PRELEX surgery thus making Clear Lens Extraction (CLE) an option. Where astigmatism is a particular issue, the very latest advanced lens technology is available to try and reduce the degree of the astigmatism (using special toric lens implants). For those interested in lens exchange but concerned about the risk of halos and night driving difficulties that can occur following PRELEX, Clear Lens Extraction (CLE) may be a more acceptable option.
You can find more information on Clear Lens Extraction (CLE) by contacting us and arranging to see one of our specialist surgeons.
These are the most commonly used lens and offer a single zone of clear focus, usually to provide excellent distance vision. Often patients will require reading glasses for near tasks. Some patients can benefit from “monovision” where the dominant eye is corrected for distance vision and the non-dominant eye is corrected for near vision (for reading).
Multifocal lenses are very much like varifocal glasses and are designed to divide the image into several zones using a series of circles etched into the lens usually allowing a patient to see for near, for intermediate distance andalos for far away. There are many types of lens available including the AcroSof ReSTOR, Zeiss AT LISA, and LENTIS Mplus.
Multifocal IOL’s reduce the likelihood that you will be required to wear glasses or contact lenses after surgery as they incorporate both distance and near powered optics into one lens and these work together to provide the eye with a full range of vision. Some patients can experience ghosting, glare and haloes with these lense and there is often a reduced contrast sensitivity.
Pseudo-accomodative lenses are similar to multifocal lenses but are clear and do not have the disadvantage of causing ghosting, glare or haloes. They can be effective in many patients but the outcome for near vision can be variable.