Implant Lenses

Lenses in focus 1: The Rayner Extended Monovision Implant Lens

Cataract extraction has become the most commonly performed and highly successful surgical procedure worldwide. Due to its low surgical risk and the consistently high-quality outcomes it delivers, lens surgery is now considered at an earlier stage of development and for those seeking reduced dependence on spectacles.

The quality of vision achievable with any implant lens and the extent to which it can provide freedom from spectacles depend largely on the overall health of the eye and individual anatomical variations. While true multifocal implants can offer multiple focal points, they may be subject to some loss of vision quality, such as decreased contrast sensitivity, as well as aberrations like haloing around points of light and ghosting. Various ophthalmic conditions, including lazy eye, dry eye, age-related macular changes, and glaucoma, can limit the success of multifocal implants and are considered contraindications in such cases.

Extended Depth of Focus (EDOF) lenses bridge the gap between simple monofocal lenses and complex multifocals, emphasising both vision quality and a reasonable range of focusing capabilities while acknowledging occasional glasses use. The measure of success isn’t solely defined by reading optician’s charts in well-lit examination rooms but rather by real-world scenarios, adapting to various vision-related tasks under different lighting conditions. It’s crucial to comprehend an individual’s unique lifestyle, needs, and expectations before opting for surgery and selecting a specific lens.

The Rayner Extended Monovision Implant Lens is particularly suitable for patients with active lifestyles who desire spectacle independence during social activities, sports, or computer usage but are comfortable wearing reading glasses for close-up tasks like reading books or newspapers.

The Rayner Extended Monovision IOL

Although an individual implant may not provide a full focal range, spectacle independence can be enhanced through monovision. In monovision, typically, one eye (usually the dominant eye) is set to achieve the best possible focus for distance, while the other eye is adjusted to improve near focus. In this arrangement, the eye set for near vision may have reduced distance vision when viewed alone, but when both eyes work together, they provide a balanced experience.

Summary

• Rayner EMV surgery offers exceptional vision quality, surpassing traditional multifocal lenses and is a enhanced monofocal.
• It provides an impressive level of spectacle independence.
• Reading glasses may still be required for fine near work.
• The EMV IOL minimises the aberrations commonly associated with multifocal implants.
• The degree of spectacle independence is a realistic goal, although not an absolute guarantee.

Lenses in focus 2: Extended Depth of Focus (EDOF) Intraocular Lenses

Cataract extraction stands as the most widespread and successful surgical procedure globally. Given its low surgical risk and consistently high-quality outcomes, lens surgery is now considered at an earlier stage of development, even for those who seek reduced dependence on spectacles.

The quality of vision achievable with any implant lens and its ability to provide spectacle independence depend heavily on the overall eye health and individual anatomical variations. While true multifocal implants offer multiple focal points, they may be subject to some loss of vision quality, including decreased contrast sensitivity, and may introduce aberrations such as haloing around points of light and ghosting. Various ophthalmic conditions, including lazy eye, dry eye, age-related macular changes, and glaucoma, can limit the success of multifocal implants and are considered contraindications in such cases.

EDOF lenses bridge the gap between simple monofocal lenses and complex multifocals, prioritising quality and a reasonable range of focusing while recognising the occasional need for glasses. The true measure of success isn’t merely reading an optician’s chart in a softly lit examination room but rather the ability to excel in everyday situations, handling a variety of vision tasks under varying lighting conditions. It’s imperative to grasp an individual’s specific lifestyle, needs, and expectations before committing to surgery and selecting a particular lens. An EDOF implant is particularly suitable for patients with active lifestyles who desire spectacle independence during social activities, sports, or computer usage but are content wearing reading glasses for close-up tasks like reading books or newspapers.

The Acunex Vario IOL

The Acunex Vario lens is engineered to deliver quality vision with minimal side effects, offering a high degree of spectacle independence at a reasonable additional cost. The lens employs a proven plastic material to avoid surface glistening, a phenomenon reported with other implant lenses, often referred to as NoGlis technology.

While an individual implant may not provide a full focal range, independence from spectacles can be enhanced through monovision. In monovision, typically, one eye (usually the dominant eye) is set for the best possible focus at a distance, while the fellow eye is adjusted to provide an improved focus for near vision. In this setup, the eye optimised for near vision may have limited distance vision when viewed independently, but when both eyes work together, they provide a balanced experience.

EDOF + NoGLIS

This one-piece posterior chamber lens combines extended depth of focus with high contrast sensitivity, featuring an aspherical surface and a blue light filter.

Summary

• Acunex Vario surgery offers outstanding vision quality, surpassing traditional multifocal lenses.
• It provides an impressive level of spectacle independence.
• Reading glasses may still be needed for very fine near work.
• Acunex Vario is free of the aberrations commonly associated with multifocal implants.
• Achieving spectacle independence is a realistic goal, though not an absolute guarantee.

Lenses in focus 3: Premium intraocular lenses

When it comes to intraocular lenses (IOLs), there is no one-size-fits-all solution. At Sapphire Eye Care, we recognise the diversity of needs, and that’s why we offer a range of premium implant lenses to cater to your unique requirements.

The Zeiss Trifocal Intraocular Lens: Enhancing Vision for Modern Lifestyles

Multifocal implants have been a staple in vision correction for years, traditionally offering bifocal options with limited focusing power. However, in today’s world, where computer work and the need for unaided intermediate vision are prevalent, the concept of multifocal lenses has evolved. Enter the Zeiss Trifocal Intraocular Lens, a cutting-edge solution that caters to the demands of modern life.

Advantages of a Trifocal Lens

The Zeiss Trifocal Lens, known as the AT LISA tri, stands out among a range of trifocal lenses available today. Zeiss, renowned for its optical excellence, brings a trifocal lens that provides distinct focus points for distance, arms’ length, and near vision. This innovative lens offers several advantages:

Spectacle-Independence: One of the primary benefits of the trifocal lens is its potential to reduce dependence on spectacles. While it excels in providing clear vision for daily tasks, some users may experience a slightly compromised intermediate vision compared to other options. However, for the majority of patients, this difference is negligible, mainly affecting those who engage in tasks involving intricate detail, like computer-aided design work.

Ideal for Active Lifestyles: The Zeiss Trifocal Lens is an ideal choice for individuals with active lifestyles who seek freedom from wearing spectacles for their daily activities. It’s designed to enhance vision for tasks such as standard word processing, email, and internet surfing. While most users can enjoy spectacle-independence, a minority may still require simple readers for small print or when working in dim lighting conditions. Keep in mind that individual outcomes can vary, so this guidance serves as a general rule.

Trifocal Range

The trifocal lens creates three distinct focus points for distance, intermediate, and near vision. This versatility makes it a valuable choice for various tasks, ensuring that wearers can adapt seamlessly to different activities throughout the day.

Disadvantages of a Trifocal Lens

While the Zeiss Trifocal Lens offers significant advantages, it’s essential to consider potential drawbacks:

Splitting Light: Unlike varifocal spectacle lenses, multifocal intraocular lenses like the trifocal lens split light from objects into three different images. Two of these images are unfocused, while one is sharply concentrated on the retina, appearing as the true image. While the brain processes these images effectively, patients may experience a minimal reduction in contrast sensitivity, especially in dim lighting. Trifocal lenses are generally recommended for individuals with potentially excellent vision, and they may not be suitable for those with certain ocular pathologies like dry eye disease.

Halos and Glare: Optical aberrations like halos and ghosting are less common with trifocal lenses compared to earlier multifocal generations. However, halos around point light sources, such as car headlights while driving at night, may be perceived when the pupil is dilated. This can affect those who extensively drive at night and may even be considered an exclusion for holding a pilot’s license in some countries.

Summary:

• The Zeiss trifocal IOL offers excellent vision quality throughout the focal range
• It provides the maximum possible degree of spectacle-independence
• Simple readers may still be required for occasional near vision tasks
• Rings will be visible around point light sources at night, but adaptation is rapid