During the cataract surgery the natural lens is removed and replaced with IOL (Intraocular lens) and vision is restored. The selection on the type of IOL will support the necessary correction to be implemented whether it is cataract, astigmatism or presbyopia etc. Apart from the correction another decision would be the need to use glasses or go spectacle independent.
What are the types of lenses and implants?
Some of the types of lenses and implants are.
Traditional lens Implant:
- Monofocal lens: This is the most commonly used lens since decades. They are called Monofocal lens because they give the sharpest focus only one distance. Depending on which vision is selected i.e. (near or distant) glasses would be required. These lenses are suitable if you are willing to wear glasses. If you have set the monofocal lens for distance vision then for near vision glasses would be required and vice versa. It assists Monovision (one eye can be set for distance vision while the other eye takes care of the near vision). It does not correct Astigmatism and Presbyopia.
Premium lens Implant:
- GOAL: Astigmatism correction.
- Toric lens- Toric lens is primarily used in the correction of distance vision and near vision would still need glasses. This is another option to correct Astigmatism rather than making extra incision in your cornea.
- GOAL : Presbyopia correction.
- Multifocal lens – Multifocal lens aid in Presbyopia correction. They have varied power which makes one see at varied distances. Vision without glasses is possible although visual outcome varies from person to person.
If you do not have significant astigmatism and wish to have distance and near vision with limited intermediate vision needs then a multifocal IOL is best choice.
- Accommodating Lens: Helps to correct Presbyopia allowing the focus at multiple distances
but likely to cause glare and halos.
What are the factors in the selection of an IOL for your eye?
- Realistic Vision goal – Your need should be prioritised and must discuss with us on what exactly is your vision goal.
- Present eye condition – An eye check up will reveal the present conditions based on which the IOL would be suggested.
- Type of eye surgery / correction conducted – Previous and current history need to discussed for proper selection of your IOL.
- Life style needs – Some require near vision more often depending on the type of job or daily tasks undertaken.
- Cost – Premium lens are not covered by Insurance unlike Traditional lens. Premium lens are more expensive than Traditional lens.
- Risk and complications – Enhancement surgeries may be required on case to case basis. Some IOLs can cause gare and halos after implant.
- Spectacle Independence – If you do not wish to wear glasses after cataract surgery, you need to choose IOL that does not require glasses.
You need to discuss the risks, benefits and alternate options during the eye examination.
Each IOL is best in its relevant feature.
No IOL is perfect. We need to understand if your eye is suitable for a particular lens.
Each eye need is unique and the suitability of the best matching lens will optimize the ultimate visual outcome.