Laser Eye Surgery激光眼科手术
Laser Eye Surgery Using Photorefractive Keratectomy激光眼科手术用准分子激光
Photorefractive keratectomy (PRK) is a laser eye surgery procedure that is carried out with the key intent to correct a patient’s vision.屈光性角膜切削术(prk)是一个激光眼科手术的程序进行,主要意图纠正病人的视力. PRK permanently adjusts the shape of the frontal corneal tissue using an excimer laser, which is a high-precision ultraviolet chemical laser.准分子永久调整形状额叶角膜组织,用准分子激光这是一个高精度紫外线的化学激光. The outer layer of the cornea (epithelium) is removed, and then a tiny amount of the corneal tissue is burnt off wearing the laser.外层角膜(上皮),是拆除然后极少量角膜组织,是被烧过的戴激光打印机. Such an ablation renders the preferred shape to the cornea and allows for superlative refraction.这种消融使得首选形成角膜,让浪漫的折射.
PRK is a technologically advanced laser vision correction surgical procedure.准分子是一种先进的激光矫正视力手术. For instance, a computer system drafts the eye position around 4,000 times per second, redirecting laser pulses for exact ablation.举例来说,一个电脑系统汇票眼睛周围阵地,4000次每秒,改变激光脉冲精确消融. As covered above, the epithelium is removed prior to ablation.盖以上,是上皮之前去掉消融. This does not cripple the patient’s vision, since the epithelium is a soft and regenerating layer, which is experienced of absolutely replacing itself within a matter of days.这并不削弱病人的视力,因为上皮细胞是一种软再生层这是经验,绝对取代本身在短短数天. However, the deeper layers, once burnt off, will be left that way because they possess paltry regenerative capability.但是,更深层次,曾经燃烧过的,将留下这样的,因为他们拥有少量的再生能力. This concept is the essence of the Photorefractive keratectomy surgical procedure.这一概念是本质的屈光性手术.
PRK contrasts from LASIK laser surgery in a way that the epithelium is removed in PRK and allowed to regenerate.反差准分子激光从激光手术方式上皮去掉prk和允许再生. On the other hand, LASIK doesn't involve epithelium removal.就另一方面,镶并不涉及上皮清除. Instead it consists of cutting a flap in the cornea in order to make the appropriate incisions.相反,它包含了切瓣,在角膜上,以做出适当的切口. Compared to LASIK, a patient who has undergone PRK haves more pain and recovery is slow.相比激光,有一个病人接受准分子富有更多的痛苦和经济复苏缓慢. However, both procedures are similar in the respect that they make use of a laser.不过,无论是程序大致相同,在这方面,他们利用一种激光.
Photorefractive keratectomy is a viable laser vision correction procedure, but it does have possible complications.准分子激光是一个可行的激光矫正视力程序,但它确实有可能发生的并发症. Apart from slow recovery and pain, the patient may experience glares and halos.除了经济复苏将是缓慢和痛苦,病人可能是引人注目的经验和光环. As in any refractive surgery, there is a possibility of over- or under-correction.正如任何屈光手术,有可能高估或下校正. Eye surgeons typically perform PRK on one eye at a time, in order to gauge the results of the procedure and ensure its efficacy.眼科外科医生通常进行prk上一只眼睛,一时间,为了衡量结果的程序,并确保其功效.
In a majority of cases, PRK has proven to be a safe and efficacious laser eye surgery new york procedure to correct myopia.在大多数情况下,准分子已被证明是一种安全有效的激光眼科手术纽约程序,以纠正近视. However, since the procedure is irreversible, it is recommended that the patient consults an eye doctor instead of jumping on a conclusive answer.不过,由于程序是不可逆转的,它还建议,征求病人的一个眼科大夫,而是跳跃到了一个决定性的答案.
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