With the rise of technology, our patients’ needs expand, as do their expectations regarding quality of life and visual acuity following cataract surgery (hopefully forgoing the need for additional pairs of glasses). Lens implants utilised in cataract surgery can be divided into standard, and Premium groups.
Standard lenses are monofocl and allow for the correction of spherical errors, i.e. Myopia or hyperopia. With a standard monofocal lens, the patients retain the need for additional reading glasses.
Premium group lenses
Premium group lenses can be divided into:
- Toric lenses – additional astigmatism correction
- Multifocal lenses – additional presbyopia correction, removes the need for reading glasses
Both standard and Premium lenses can additionally be equipped with :
- an aspherical shape (reducing spherical aberrations and unwanted optical phenomena), which improves contrast vision.
- UV and blue light filters, which protect the macula from age-related degeneration – AMD.
The aspherical shape of the implants reduces spherical aberrations. The spherical aberrations phenomenon (experienced by the patient as a halo around light sources, or image blurring) comes as a result of greater light refraction in peripheral parts of the cornea compared to the central one. These optical phenomena are particularly noticable in negative light conditions, when the pupil naturally dilates. The use of aspherical implants, which have greater refractive poweron the exterior, compensate for corneal aberrations and improve contrast, visual acuity, and quality of vision. This is especially important for those who drive at night, or have to work in negative lighting conditions. Aspherical lenses possess a modified optical element, so that light passing through the exterior parts is focused in the same spot as light which passes through the central part.
Lenses with UV and blue light filters
The use of UV and blue light filters removes the harmful parts of light beams, protectively affecting the retinal pigment epithelium, and reducing the risk of AMD, the most common cause for irreversible blindness in patients over 60th year of age. Additionally, research has shown patients with implants containing UV and blue light filters displaying a significantly lower incidence of eye melanoma, compared to those with implanted lenses without these filters.
Toric lenses enable astigmatism correction. Astigmatism is the disorder of the eyeball’s rotational axis as a result of irregularities and asphericity of the eye surface. It is experienced by the patient as reduced visual acuity, image distortion, and decreased contrast.
The use of an intraocular toric lens is an additional option, chosen by the patient in order to correct their astigmatism.
People who have struggled in the past with an acceptance of cylindrical correction in glasses can choose a toric implant without worries, as their effect is immediate, and permanent. The treatment provides excellent visual acuity, better even than at any time before cataract development. Amblyopia (or “Lazy eye”) is not a counterindication for monofocal toric lenses, and neither is a past implantation of a standard monofocal spherical lens in the other eye.
Following cataract surgery and a monofocal intraocular lens implantation, the eye loses the accommodation ablility. Depending on the expected refractive effect, there may arise a need for corrective glasses for reading or far sight. Initial corrective efforts to resolve accommodation deficiency revolved around the use of monovision.
Monovision involves calculating lens strength to ensure excellent visual acuity for far sight in one eye, and close range observation the the other. Unfortunately, monovision takes place at the cost of stereoscopic vision, which significantly impacts judging distances, for example when driving vehicles.
To reduce the amount of unwanted side effects, reduce the contrast sensitivity deterioration effect, and separate vision quality from pupil diameter, a pseudo-accommodating lens model has been developed, combining the benefits of both diffractive and refractive lenses – the AcrySof ReSTOR lens (Alcon).
AcrySof® IQ Vivity ™
This highly advanced intraocular lens possesses an increased depth of field and a wide field of view. It’s constructed from a hydrophobic material (AcrySof®), a UV filter, and a blue light filter, which protect the eyes from dangerous radiation.
The Vivity™ lens belongs to the EDOF (Extended Depth of Focus) lens category. This puts it in between multifocal lenses which offer a wide field of view, and monofocal lenses usually used for depth of vision.
Having gone through the procedure of implanting Vivity™ lenses, patients experience a wider field of view – starting with long distance viewing, through middle distances, to functional up-close vision.
An additional benefit is a lack of effects such as flashes, or the halo effect.
The aspherical shape of the IOL AcrySof® IQ Vivity™ lens allows for a better quality of imaging. A slightly raised, convex surface is divided into two areas, ensuring a wider focusing range.
AcrySof® IQ Vivity™ IOL is the ideal solution for:
- Patients who do not qualify for a multifocal lens implant but wish to rid themselves of limitations which come with using corrective glasses, and want to achieve better, functional vision than that which comes with monofocal lenses.
- Drivers wanting to avoid the risk of unwanted light phenomena after dark.
- People spending many hours in front of a computer screen, for whom near vision is important.
- For all those who wish to achieve a better contrast compared to monofocal lenses.
AcrySof® IQ PanOptix®
AcrySof® IQ PanOptix® is a next generation multifocal lens. It was designed to guarantee high quality vision in near-, far-, and midrange vision. A majority of multifocal lenses ensure sharp vision only at a midrange of approx. 80 cm. The AcrySof® IQ PanOptix® lens was designed to ensure a comfortable viewing experience mainly for the 60cm distance, as that is utilised in everyday computer use. Thanks to its unique shape, the AcrySof® IQ PanOptix® allows achieving natural comfort of vision and freely moving focus across objects of varying distances in the range between 40-80cm. The PanOptix® lens innovativeness makes it so that even at reduced lighting, therefore whenever the pupil becomes dilated, visual acuity is maintained at all distances. Intraocular AcrySof® lenses have been clinically tested, and excel at biocompatibility. Thanks to their properties and shape, they facilitate safe implantation and maintain their stability in the eye for the entire lifespan. Additionally, the UV filter and a blue light filter protect the retina from high energy light, reducing the risk of future AMD progression.
What differentiates it from other lenses?
- A more comfortable viewing experience in wide near- and midrange vision – allows for a very optimal focal point 60cm away, preferred for performing everyday activities
- Lesser dependancy on pupil diameter – allows for high quality vision in various illumination levels
from 2500 PLN