Presbyopia
Presbyopia is a natural part of the aging process of the eyes. Symptoms typically begin to appear around the age of 40. While presbyopia is not a serious eye disease, when daily life is affected, presbyopia surgery may be considered to correct vision. However, the limitations of traditional presbyopia correction often require patients to undergo additional surgeries.The newly introduced Presbymax laser presbyopia correction surgery addresses many of these issues, offering a significant benefit for those experiencing presbyopia.
什麼是老花？
The primary cause of presbyopia is the degeneration and hardening of the lens inside the eye. This degeneration causes the lens to lose its elasticity and reduces its refractive power. The lens gradually loses its original flexibility and function, making it difficult for the eye to focus on nearby objects, especially in dimly lit environments.
In the past, presbyopia typically only affected individuals over the age of 40. However, in recent years, with technological advancements, everyone now possesses smartphones, computers, and tablet devices, making daily life inextricably linked to these digital products.Many people spend extended periods staring downward at screens, causing prolonged tension in the ciliary muscles and accelerating the aging process of the eyes. In Hong Kong, the incidence of presbyopia among individuals under 40 has increased by 20 to 30 percent, with many experiencing symptoms as early as between the ages of 35 and 40.
How can you tell if you have presbyopia, myopia, or hyperopia?
Presbyopia
People often confuse presbyopia with hyperopia because both involve difficulty seeing objects up close. However, their causes and treatments differ significantly. Presbyopia is an age-related vision problem. It primarily results from weakened ciliary muscle accommodation and a hardened, less elastic lens, making it difficult to focus on near objects.
Myopia
Myopia refers to the condition where objects at close range appear clear, but distant objects appear blurred. This occurs because the eyeball is too long or the cornea is too steep, causing the focal point to fall in front of the retina.
遠視
Hyperopia refers to a condition where distant objects appear relatively clear, but near objects may appear blurry. This occurs because the eyeball is too short in length or the cornea is too flat, causing the focal point to fall behind the retina.
How is presbyopia currently addressed or managed in the community?
佩戴老花眼鏡
Wearing reading glasses is one of the most common ways to address presbyopia. However, reading glasses need to be carried around, as they are only required when viewing objects at close range. This may make carrying glasses a habit, which could be inconvenient for some people.
Additionally, reading glasses only provide clear vision at specific distances. For individuals with both nearsightedness and presbyopia, this may necessitate constantly switching between glasses of different prescriptions for different situations. This can be bothersome for some people, potentially affecting their confidence and participation in social activities.
Dual-purpose contact lenses
Bifocal contact lenses feature two distinct prescriptions, enabling wearers to see clearly at both near and far distances simultaneously. While bifocal contacts eliminate the need to frequently switch between two pairs of glasses like reading glasses, wearing contact lenses can be relatively challenging for some individuals. It also requires a period of adjustment after initial wear. Furthermore, bifocal contacts are not suitable for every patient, particularly the elderly.
Additionally, extended-wear contact lenses require regular cleaning and maintenance, and there are certain precautions to take during use to prevent eye injuries or bacterial infections. These are all factors patients should consider before choosing extended-wear contact lenses to ensure eye safety.
Presbyopia Surgery
With continuous advances in medical technology, methods for correcting presbyopia are no longer limited to traditional corrective aids. Patients now have the option to undergo presbyopia surgery, addressing the root cause of the condition and eliminating dependence on conventional reading glasses or contact lenses. The most advanced presbyopia correction surgeries available today include LBV Presbyopia Correction, SMILE Presbyopia Correction, and the latest German technology, Presbymax Presbyopia Correction.These presbyopia correction procedures offer patients a wider range of options. Individuals can select the most suitable method based on their specific needs and budget.
Current refractive surgery for presbyopia
Patients need not be overly concerned about presbyopia, as methods for correcting it are becoming increasingly diverse. Techniques such as LBV Presbyopia Correction, SMILE Presbyopia Correction, and Presbymax Presbyopia Correction all offer significant convenience to patients.
LBV Presbyopia Correction
Laser Blended Vision (LBV) is a modern presbyopia correction technique that preserves a certain degree of visual disparity between the two eyes. By sculpting the cornea to induce aberrations, it extends the depth of field, thereby achieving clear vision at three focal lengths: distance, intermediate, and near.
The core principle of this technology lies in utilizing laser techniques to increase spherical aberration, thereby expanding the depth of focus. Simultaneously, it enhances visual acuity and stereoscopic sensitivity at distant, intermediate, and near ranges, enabling individuals to more effortlessly adapt to visual demands across varying distances.
The doctor will use laser technology to perform precise micro-cuts and reshape the patient's cornea. In the dominant eye, this corrects myopia, hyperopia, and astigmatism to near zero diopters, enabling clear distance vision.The other eye is intentionally left with or created to have approximately 150 degrees of myopia. This allows for clear near vision and helps counteract presbyopia. Additionally, a slight spherical aberration is introduced to increase depth of field and extend the focal point. This creates a "Blend Zone" for the patient, providing excellent near, intermediate, and distance vision.
LBV Presbyopia Correction is suitable for presbyopic patients aged 40 to 65 without cataracts, and can simultaneously correct up to 300 diopters of presbyopia, 200 diopters of astigmatism, and 800 diopters of myopia or 200 diopters of hyperopia.
Disadvantages of LBV Presbyopia Correction
- Individuals with keratoconus, mature cataracts, glaucoma, or a history of corneal infections or immune system disorders may not be eligible for LBV presbyopia correction.
- Especially for patients with mature cataracts, LBV presbyopia correction may not achieve the desired results, and further progression of the cataracts could lead to continued vision loss.
- Individuals who have previously undergone laser vision correction must also undergo a detailed examination of corneal structure and thickness to determine their suitability for LBV presbyopia correction.
SMILE Presbyopia Correction
Small Incision Lenticule Extraction (SMILE) for Presbyopia Correction This innovative technology can correct vision for patients with myopia, astigmatism, and presbyopia. Over 5 million SMILE procedures for presbyopia correction have been performed globally. The technique is gradually gaining popularity in Hong Kong, offering patients a solution for presbyopia correction.
SMILE presbyopia correction utilizes the Carl Zeiss VisuMax femtosecond laser system. Without creating a corneal flap, it forms a thin lens (lenticule) within the cornea through a micro-incision of approximately 2 to 4 millimeters. The cut corneal tissue is then separated and removed through this small incision, altering the corneal curvature to achieve vision correction.The core principle of SMILE presbyopia correction involves laser-flattening the dominant eye to achieve plano vision (for viewing intermediate and distant objects), while leaving the non-dominant eye with approximately 50-200 degrees of myopia (for near vision) to counteract presbyopia.
Disadvantages of SMILE Presbyopia Correction
- Individuals with hyperopia, myopia exceeding 1000 diopters, or astigmatism exceeding 500 diopters may not be suitable candidates for SMILE presbyopia correction.
- The monovision principle of SMILE presbyopia correction may cause blurred intermediate vision and result in reduced depth perception.
Therefore, when considering LBV/SMILE presbyopia correction, patients should determine whether these two presbyopia correction procedures are suitable based on their individual visual needs and circumstances.
In addition to LBV and SMILE presbyopia correction , are there better options?
Presbymax Presbyopia Correction
Presbymax presbyopia correction is the latest treatment technology on the German AMRIS excimer laser platform. It utilizes excimer laser to perform precise sculpting on the corneal surface. Post-surgery, the cornea achieves a multifocal state, with the central zone for near vision and the peripheral zone for distance vision. This enables patients to achieve clear vision at all distances—near, intermediate, and far—after surgery.Compared to expensive multifocal intraocular lens surgery, Presbymax offers a more affordable solution, bringing new hope to a wide range of presbyopic patients.
The Presbymax presbyopia correction procedure takes only a few minutes to complete, enabling the cornea to achieve a multifocal state post-surgery. This multifocal configuration allows the central cornea region to support near vision while the peripheral region supports distance vision, thereby delivering clear vision across all distances—near, intermediate, and far.
Near Zone
Presbymax presbyopia correction effectively maintains clear near vision, overcoming the challenges of reading caused by presbyopia. It restores near reading vision, allowing patients to effortlessly enjoy activities such as reading books and documents.
Intermediate distance zone
Presbymax presbyopia correction also delivers outstanding vision at intermediate distances, such as when using computer screens, tablets, or attending meetings. This technology effectively addresses daily work and leisure activities, ensuring patients can clearly see what they need at mid-range distances.
Look into the distance
For distance vision, Presbymax presbyopia correction also delivers exceptional results. This means patients can easily recognize distant road signs, markers, or scenery without the limitations imposed by presbyopia.
Presbymax Presbyopia Correction Advantages
Presbymax presbyopia correction technology harnesses the remarkable power of laser to deliver a revolutionary visual experience, demonstrating superior results across multiple dimensions. This precision-engineered technique meticulously reshapes the corneal surface by strategically applying laser energy to different zones, creating a convex lens effect. This effect ensures light refracts at an optimal angle upon entering the eye.Particularly in the central area of the eye, a unique teardrop-shaped structure is created. This design focuses on near objects regardless of pupil size, making it especially suitable for Asian individuals. More notably, Presbymax presbyopia correction surgery enables comprehensive three-dimensional vision at far, intermediate, and near distances, allowing patients to enjoy clear vision at all ranges.
Why Choose Presbymax Presbyopia Correction ?
In fact, Presbymax has gained widespread global recognition and steadily evolved into a mature solution for presbyopia correction. Presbymax not only provides multi-distance vision correction but also delivers exceptional postoperative stability and high patient satisfaction.
Presbymax presbyopia correction surgery can be completed in as little as 10 minutes and causes no discomfort, allowing most patients to resume normal activities within just 24 hours. Within weeks, patients can experience the return of perfect vision—a significant improvement for both eye health and quality of life.
Presbymax presbyopia correction not only significantly improves eye health at the technical level but also offers presbyopic patients more flexible and diverse options for vision correction. The exceptional performance and efficacy of this technology undoubtedly make it a standout in the field of presbyopia correction. If you seek a convenient, quick, and highly effective method for presbyopia correction, Presbymax is undoubtedly your ideal choice.