|
KMID : 0360220210620020201
|
|
Journal of the Korean Ophthalmological Society
2021 Volume.62 No. 2 p.201 ~ p.206
|
|
|
Intraocular Lens Power Calculation Using Shammas-PL Formula after Laser In-situ Keratomileusis
|
|
Park Se-Young
Kwag Joo-Young
Choi Jin-Seok
Pak Kyu-Hong
Chung Sung-Kun
|
|
|
Abstract
|
|
|
Purpose: To calculate the intraocular lens (IOL) power using the Shammas-PL formula after laser in-situ keratomileusis (LASIK).
Methods: Forty-one eyes of 29 patients that had undergone cataract surgery from September 2018 to September 2019 after LASIK were enrolled in this study. A preoperative AL-Scan® (Nidek Co., Gamagori, Japan) was used to measure the axial length, anterior chamber depth, and corneal curvature. An IOL power calculation was performed using the Shammas-PL (post LASIK) formula. Mean absolute error (MAE) and mean arithmetic error (MARE) were calculated using preoperative manifest refraction and postoperative manifest refraction.
Results: Of the 41 eyes, 15 eyes (36.6%) were relatively hyperopic-shifted after surgery compared to the predicted refractive error before surgery, 25 eyes (61%) showed a relative myopic shift, and one eye (2.4%) showed no change with respect to the previous refractive predicted error. Refractive errors before cataract surgery were not related to myopic, emmetropic, or hyperopic shifting after surgery (p > 0.05).
Conclusions: When cataract surgery using the Shammas-PL formula was performed after LASIK, myopic shifting was more common than hyperopic shifting. The MAE was greater in myopic-shifted cases than that of hyperopic-shifted cases. Thus, it is better to determine IOL power toward the hyperopic side than the target refractive prediction.
|
|
|
KEYWORD
|
|
|
Cataract, Intraocular lens power calculation, Laser in-situ keratomileusis, Shammas-PL
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
  
|
|