An intraocular lens is implanted in the eye when your all-natural lens which has actually turned opaque because of the advent of cataract, to restore your vision to ideal. With advances in available technology for cataract surgical procedure, improving and making it convenient and a day-care surgery without any hospitalization, the types of intraocular lenses, called IOLs, have actually also undertaken a revolutionary change, making vision correction simpler and more convenient. The very first IOL that was implanted in the human eye, was made from an acrylic material called Perspex.
Intraocular lenses were accepted as “safe as well as effective” in the UNITED STATES by the Food and Drug Administration (USFDA) only in 1981. From then to currently, the type of lenses that are readily available for implantation has been absolutely nothing short of a revolution for cataracts treatment.
Types of Intraocular Lenses (IOLs)
Two most common kinds of lenses are:
1. Anterior Chamber Intraocular Lenses (ACIOL): These lenses are positioned on top of the iris, the brown part of the eye. It is not the physical position of the all-natural lens of the eye, and this type of lens is not the usual choice IOL after non-complicated cataract surgical treatment. ACIOLs are implanted in case the posterior capsule of the lens is deficient or damaged and are specifically prescribed by eye doctors only in such cases.
2. Posterior Chamber Intraocular Lenses (PCIOL): These lenses are put into place over the residual posterior capsule in the same physiological placement as the all-natural lens of the eye and also are the recommended lenses, which are normally recommended for otherwise healthy eyes.
The remainder of this post will discuss the important types of advanced PCIOLs available for implantation after current-day cataract surgical procedure, specifically, phaco-emulsification, Micro-incision cataract surgical treatment or Femto-second laser cataract surgery. These lenses are jointly called premium IOLs.
Types of Premium IOLs
Premium IOLs are of three broad classifications:
1. Mono-focal Lenses
Mono-focal lenses, unlike the natural lens of the eye, can just restore vision for one range, that is for distance, or for near. The power of the mono-focal lenses is usually computed to ensure that the patient does not need glasses for distance vision. After having a mono-focal lens implantation, you will need reading glasses or even bifocals which are eyeglasses for both distance and near, thus not completely eliminating the need for eyeglasses, depending upon your pre-existing refractive error (specifically astigmatism). Below are the various types of mono-focal lenses:
– Aurium (Mono-focal): Aurium monofocal lenses are photo-chromatic, which means they come to be slightly tinted during daytime or bright light and also therefore protect against unsafe UV. Under regular room lighting conditions, these lenses end up being clear.
– Acrysof INTELLIGENCE (Monofocal): Acrysof IQ is a mono-focal lens which provides great vision for distance. For near vision, nonetheless, an individual may need extra reading glasses. This lens includes a yellow pigment chromate-phore which blocks harmful UV rays and also blue light from entering the eye as well as harming the retina.
– Aurovue (Mono-focal): Aurovue lenses are considered as entry-level alternatives for cataract surgical treatment as well as are recommended for somebody on a lower budget plan.
– Akreos AO (Mono-focal): Akreos AO resemble Aurovue lenses.
– Acrysof SP (Monofocal): Acrysof SP is a monofocal lens which is are extra favoured in Diabetic Patients. It is also an advised alternative for somebody selecting a mono-focal lens in Regular Phaco surgical procedure.
2. Multifocal Lenses
Multifocal IOLs are lenses which offer an acceptable restoration of vision for both near and distance and not just either like momofocals. While choosing an IOL, it is essential to keep in mind that multifocal lenses provide you independence from glasses for both near and distance, and also can be personalized to your active life-style. Nonetheless, your doctor will certainly discuss with you the apparent disadvantages of these lenses, particularly glare, and also a decrease in contrast sensitivity. In case you do not intend to put on glasses for near or distance and do not wish to proceed with the added expense of a multifocal IOL, your eye doctor will certainly consider mono-vision with you. Following are the most effective multifocal lenses:
– Tecnis Harmony (Multifocal): Tecnis Harmony is a multifocal lens that offers superb distance and intermediate vision (for computer work).
– Zeiss Trifocal (Multifocal): Zeiss trifocal lenses are multifocal type lenses which are the only lenses which give excellent vision for near, intermediate and distance, all three ranges at the same time like progressive lenses in eyeglasses.
– iDiff (Multifocal): iDiff lenses are multifocal lenses that provide good vision for near and distance, which implies that a person can conveniently carry out regular daily tasks with distance vision and also do near work such as reading as well as writing easily without use of additional eyeglasses. iDiff Lenses, nevertheless, do not provide appropriate intermediate vision.
– Tridiff (Multifocal): Tridiff lenses are multifocal lenses which offer good vision for near, intermediate and distance, which implies that an individual can quickly perform routine day to day activities with distance vision, additionally do intermediate distance tasks such as working on the laptop and also complete near tasks such as reading as well as writing easily without the use of extra eyeglasses.
– Alcon Pantopix (Multifocal): It is the biggest innovation in multi-focal lenses. The lens has the ability to provide outstanding vision for distance, intermediate as well as near.
3. Toric Lenses
An eye can have two kinds of power, spherical power which is because of the natural lens within the eye as well as cylinder power which is because of the dissymmetry in the curvature of the cornea. Mono-focal and Multifocal Lenses can just correct the spherical component of the refractive error leaving behind the cylinder power which needs to be later corrected by additional prescription glasses, reducing the benefits of the lens implant. Toric Lenses can deal with both spherical as well as cylinder parts of the eye prescription. Toric lenses are advised if you have a high pre-existing cylinder or astigmatism in your eye. Below are the recommended Toric lenses:
– Acrysof IQ (Toric): These lenses are designed to correct astigmatism at the time of cataract surgery.
– Acrysof Toric (Toric): These lenses have all the properties of Acrysof IQ in addition to cylinder improvement.
– Zeiss (Toric): The lens is among the benchmarks in premium cylinder correction.
Which is the most effective IOL for you?
In medicine, like life, there is no single best solution. Your eye doctor will discuss with you the possible benefits of each of these lenses, and help you pick the one, best fit for your lifestyle and vision needs, along with your expectations from cataract surgery.
Lifestyle and priorities: In case you have an extremely active lifestyle that entails a lot of precise focusing outdoors, like playing golf, you might endanger your near vision however not your distance vision. If you travel a lot, you might prefer to not depend on glasses at all, sacrifcing a little accuracy for both near as well as distance vision. On the other hand, if you take pleasure in stitching or needlework, you will desire good near vision.
Pre-existing illnesses: In case of certain eye conditions like advanced glaucoma, corneal disease or age-related macular degeneration, you may not be an excellent prospect for certain lenses, like the multifocal lens. Your ophthalmologist will certainly carry out a thorough eye examination as well as discuss its outcomes as well as implications with you, to assist you choose the most effective and feasible lens for your eye.
Prices: These lenses are a lot more pricey than standard IOLs, adding an incremental value to the cost of cataract surgery. The premium lenses come with a price that is normally not covered by insurance companies.
The eye doctors at Khanna Vision Institute are well versed in using premium IOLs following cataract surgery in CA and also have had the experience of implanting hundreds of these lenses. Our optometrist will be more than happy to go over all the choices readily available and help you pick the best option for your eye health, and also vision needs.