Presbyopia

老花是眼睛自然老化過程中的一部分，當人們達到40歲左右時，老花的症狀就會開始出現。雖然老花並非嚴重的眼睛疾病，但當日常生活受影響，也可考慮進行老花手術來矯正視力。然而，傳統老花矯視的不完善之處，令病人需要再次進行手術。現時最新引入的 Presbyond 的老花激光矯視手術可改善不少問題，是老花人士的一大福音。

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

隨著醫學不斷進步，矯正老花眼的方法已經不僅限於使用傳統工具輔助，患者現在可以選擇進行老花手術，從根本解決老花問題，擺脫對傳統老花眼鏡或隱形眼鏡的依賴。而當今最先進的老花矯視手術包括了LBV老花矯視、SMILE老花矯視及德國最新技術 Presbyond 老花矯視。這些老花矯視手術給患者提供了更多樣的選擇，患者可以根據自己的需求和預算，選擇最適合自己的老花矯正方式。

Current refractive surgery for presbyopia

面對老花問題，患者無需過於擔心，因為老花矯視的方法日益多樣化。例如，LBV老花矯視、SMILE老花矯視以及 Presbyond 老花矯視等技術，皆為患者帶來不少方便。

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.
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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?

Presbyond 老花矯視

Presbyond 老花矯視是德國AMRIS阿瑪仕準分子激光平台上的最新的治療技術，利用準分子激光在角膜表面進行精細切削塑性，術後角膜呈多焦點狀態，角膜中央區用於看近，周邊區用於看遠，這樣就可以讓患者術後同時獲得遠中近程的清晰視力。Presbyond 老花矯視技術價格相比起昂貴的多焦點人工晶體手術來講更親民，對於廣大老花患者來說是個新福音。

Presbyond 老花矯視整個治療過程只需要數分鐘，能夠讓角膜在術後呈現多焦點狀態。這種多焦點狀態使得角膜的中央區域適合近距離視覺，而周邊區域適合遠距離視覺，從而實現遠、中、近全距離的清晰視覺：

Near Zone

Presbyond 老花矯視可有效實現近距離保持清晰的視野，克服老花對閱讀帶來的困擾，實現近距離閱讀視力，讓患者輕鬆享受閱讀書籍、文件等活動。

Intermediate distance zone

Presbyond 老花矯視還能在中等距離上提供出色的視力，例如在使用電腦螢幕、平板電腦或參加會議時。這種技術能夠有效地應對日常工作和娛樂活動，確保患者在中程距離時能夠清楚地看到所需內容。

 

Look into the distance

對於遠距離視力，Presbyond 老花矯視同樣能夠提供卓越的矯正效果。這意味著患者可以輕鬆辨識遠處的路標、標誌或風景，而不再受到老花帶來的限制。

Presbyond老花矯視的優勢

Presbyond 老花矯視技術借助激光的神奇力量，為眼睛帶來了嶄新的視覺體驗，並在多個方面展現出優越的效果。Presbyond 精密的老花矯視技術，對角膜表面進行巧妙的處理，通過在不同區域施加激光，形成了一種凸透鏡效果，這種效果使得光線在進入眼睛時能夠以更合適的角度折射。特別是在眼睛的正中間區域，形成了水滴狀的特殊結構，這種設計能夠聚焦近距離的物體，不受瞳孔大小的影響，這對於亞洲人來說尤其適用。更值得注意的是，Presbyond 老花矯視手術後能夠實現遠、中、近全方位的立體視覺，讓患者能夠在不同距離下都能享受清晰的視野。

為何選擇Presbyond老花矯視？

事實上，Presbyond 在全球已被廣泛認可並穩步發展為成熟的老花矯視解決方案。Presbyond 老花矯視不僅能夠提供多距離的視力矯正，而且手術後的穩定性和患者滿意度也都得到高度的肯定。

Presbyond 老花矯視手術最快10分鐘可完成以及不會引起不適感的特點，使得大多數人可以在短短的24小時內恢復正常的活動。甚至在數周內，患者就可以感受到完美視力的回歸，這對於眼睛健康和生活品質的提升都是非常重要的。

Presbyond 老花矯視不僅在技術層面極大地改善了眼睛的狀態，同時也為老花患者提供了更加靈活且多元的老花矯視選擇。這項技術的卓越性能和療效，毫無疑問地成為老花矯視領域的一個亮點。如果你尋求一種方便、快捷且高效的老花矯視方法，Presbyond 無疑是你的理想選擇。