关于激光视力矫正手术的常见误解

您是否有考虑过要进行激光视力矫正手术却有许多相关的疑问，又不确定该从哪开始，也不知该如何解除疑虑？很多时候听闻的或网络搜索所得来的资讯未必属实。决定进行激光视力矫正手术是很个人的选择，而这样的决定应该基于真实可靠的事实而非似真似假的迷思。这里我们综合了关于激光视力矫正手术的常见误解，给想要了解更多相关资讯的您参阅。

激光视力矫正手术是一种屈光矫正术，用于矫正近视、远视及散光等屈光不正。准分子激光原位角膜磨镶术(LASIK)是如今世上最为广泛的激光视力矫正手术，以致它被误解为唯一可用的激光视力矫正方案。实际上，总共有3种主要的激光视力矫正手术：

  • 第1种：全飞秒微创SMILE激光手术(ReLEx SMILE)
  • 第2种：准分子激光原位角膜磨镶术(LASIK)
  • 第3种：准分子激光角膜表层切削术(Advanced Surface Ablation，包括PRK、epi-LASIK、TransPRK及LASEK)

这3种激光视力矫正手术的主要区别在于各矫正屈光不正的方式，如下所述。然而，最终目标却是一致的：为摆脱眼镜和隐形眼镜，透过激光永久性地重塑角膜。

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第1种:
ReLEx® SMILE

  • A femtosecond laser creates a disc-shaped piece of corneal tissue (lenticule) just beneath the surface of the cornea.
  • The same laser then creates a small incision of 4mm in the cornea, from which the lenticule is removed, resulting in a reshaped cornea that corrects the vision.
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第2种:
LASIK

  • A femtosecond laser creates a 22mm flap which can be folded back temporarily.
  • An excimer laser guided by Wavefront technology (maps your eye in 3 dimensions giving a reading for the laser to customise the treatment) sculpts the corneal tissue over a few seconds to correct the refractive errors.
  • The corneal flap is repositioned and will stay in place until it is fully healed.
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第3种:
Advanced surface ablation (ASA)

  • Epithelium on corneal surface is dissolved by a diluted alcohol solution and then removed.
  • An excimer laser guided by Wavefront technology (maps your eye in 3 dimensions giving a reading for the laser to customise the treatment) sculpts the corneal tissue over a few seconds to correct the refractive errors.
  • A protective contact lens is placed over the eye until the epithelium grows back within a few days.

Some common misconceptions about laser eye treatments are listed below:

Misconception 1: Laser eye treatment only corrects short-sightedness

This is not true. Short-sightedness, long-sightedness and astigmatism can be corrected by laser eye treatments. However, there is a range of prescription in which the different treatments are able to correct. You will need to attend a pre-laser evaluation to ascertain the type of treatment which is suitable for you.

Misconception 2: Laser eye treatment is suitable for everyone

Unfortunately, contrary to popular belief, not everyone is suitable for laser eye treatment. Some exceptions may include eye prescription that has been unstable for the past 12 months, thin corneas, irregularly shaped eyes, severe dry eye, pre-existing eye conditions like cataract and glaucoma etc. While most people meet the criteria for laser eye treatment, there is still a handful who are deemed unsuitable due to one or more of the above stated exceptions.

Misconception 3:  Laser eye treatment gives me perfect vision (0 degree)

While we aim for full correction of your eye prescription. Often, due to differences in healing in different individuals, there may be residual prescription of 25 or 50 degrees after the surgery. Although not classified as perfect vision, 25 or 50 degrees will still provide excellent vision without glasses. The aim of a laser eye treatment is to give you good and not perfect vision after surgery.

Misconception 4: Laser eye treatment is painful

To put your mind at ease, the surgical process is relatively painless as numbing eyedrops will be instilled on the eyes before the surgery. However, as the numbing eyedrops wear off after the surgery, you will experience some discomfort and tearing. You are strongly encouraged to get as much sleep as possible to wear off the discomfort and tearing.

Misconception 5 – I am spectacles-free for the rest of my life after laser eye treatment

Laser eye treatment is a permanent solution and for most people, it enables them to be spectacles-free during the younger years. As people age, over the age of 40, they will progressively experience difficulty when focusing on near objects. This occurs when the natural lens gradually loses its elasticity as we age. By then, a pair of reading glasses will be required for near work like reading and sewing.

It is important not to let these misconceptions put you off from doing any laser eye treatments. At Atlas Eye Specialist Centre, we offer you a pre-laser evaluation to ascertain your suitability for the procedure. For more information on laser eye treatments, please contact us at +65 6737 9119 or atlaseye@atlaseye.sg.

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