Pentacam真实角膜净度数在屈光性角膜手术后人工晶状体计算中的应用。
Use of the pentacam true net corneal power for intraocular lens calculation in eyes after refractive corneal surgery.
作者信息
Kim Sang Woo, Kim Eung Kweon, Cho Beom-Jin, Kim Sun Woong, Song Ki Yung, Kim Tae-Im
机构信息
Vision Research Institute, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.
出版信息
J Refract Surg. 2009 Mar;25(3):285-9. doi: 10.3928/1081597X-20090301-08.
PURPOSE
To assess the accuracy and validity of true net corneal power of the Pentacam system to provide a keratometry reading for calculating intraocular lens (IOL) power in postoperative refractive surgery eyes.
METHODS
Refraction, an automated keratometry reading, and true net corneal power were measured for 30 eyes that required cataract surgery and had previously undergone refractive surgery. Target refraction values calculated with the SRK/T formula using true net corneal power were compared with postoperative manifest refraction values.
RESULTS
Using true net corneal power, the mean deviation from the desired postoperative cataract refractive outcome was 0.47 +/- 0.56 diopters (D); the actual refraction was within +/- 0.50 D of the intended refraction for 70% of eyes (21/30) and within +/- 1.00 D for 93% of eyes (28/30).
CONCLUSIONS
The true net corneal power can be used as a keratometry reading for eyes with previous refractive surgery requiring cataract surgery.
目的
评估Pentacam系统的真实净角膜屈光力在为屈光手术后的眼睛计算人工晶状体（IOL）屈光力时提供角膜曲率读数的准确性和有效性。
方法
对30只需要进行白内障手术且先前接受过屈光手术的眼睛测量其屈光、自动角膜曲率读数和真实净角膜屈光力。将使用真实净角膜屈光力通过SRK/T公式计算出的目标屈光值与术后明显屈光值进行比较。
结果
使用真实净角膜屈光力时，与期望的术后白内障屈光结果的平均偏差为0.47±0.56屈光度（D）；70%的眼睛（21/30）实际屈光在预期屈光的±0.50 D范围内，93%的眼睛（28/30）在±1.00 D范围内。
结论
对于先前接受过屈光手术且需要进行白内障手术的眼睛，真实净角膜屈光力可作为角膜曲率读数。
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