TY - JOUR
T1 - Development of a nomogram for femtosecond laser astigmatic keratotomy for astigmatism after keratoplasty
AU - St. Clair, Ryan M.
AU - Sharma, Anushree
AU - Huang, David
AU - Yu, Fei
AU - Goldich, Yakov
AU - Rootman, David
AU - Yoo, Sonia
AU - Cabot, Florence
AU - Jun, Jason
AU - Zhang, Lijun
AU - Aldave, Anthony J.
N1 - Publisher Copyright:
© 2016 ASCRS and ESCRS.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - Purpose To develop a nomogram for femtosecond laser astigmatic keratotomy (AK) to treat post-keratoplasty astigmatism. Setting Three academic medical centers. Design Retrospective interventional case series. Methods A review of post-keratoplasty femtosecond laser AK was performed. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, manifest refraction, and keratometry were recorded preoperatively and 1, 3, 6, and 12 months postoperatively. The location, length, depth, and diameter of the AK incisions were recorded, and the surgically induced astigmatic correction was related to these variables using regression analysis. Results One hundred forty femtosecond laser AK procedures were performed after penetrating keratoplasty (PKP) (n = 129) or deep anterior lamellar keratoplasty (DALK) (n =11), with 89 procedures (80 PKP, 9 DALK) included in the analysis. The mean CDVA improved from 20/59 (0.47 logMAR ± 0.38 [SD]) preoperatively to 20/45 (0.35 ± 0.31 logMAR) postoperatively (P =.013) (n = 46). The mean keratometric astigmatism decreased from 8.26 ± 2.90 diopters (D) preoperatively to 3.62 ± 2.59 D postoperatively (P <.0001) (n = 89). The mean refractive cylinder decreased from 6.77 ± 2.80 D preoperatively to 2.85 ± 2.57 D postoperatively (P <.0001) (n = 69). A nomogram for femtosecond laser AK to treat post-keratoplasty astigmatism was generated using regression analysis. Conclusions Femtosecond laser AK significantly improved UDVA and CDVA and significantly reduced keratometric astigmatism and refractive cylinder after keratoplasty. The nomogram generated should improve the accuracy of post-keratoplasty femtosecond laser AK. Financial Disclosure None of the authors has a financial or proprietary interest in any material or method mentioned.
AB - Purpose To develop a nomogram for femtosecond laser astigmatic keratotomy (AK) to treat post-keratoplasty astigmatism. Setting Three academic medical centers. Design Retrospective interventional case series. Methods A review of post-keratoplasty femtosecond laser AK was performed. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, manifest refraction, and keratometry were recorded preoperatively and 1, 3, 6, and 12 months postoperatively. The location, length, depth, and diameter of the AK incisions were recorded, and the surgically induced astigmatic correction was related to these variables using regression analysis. Results One hundred forty femtosecond laser AK procedures were performed after penetrating keratoplasty (PKP) (n = 129) or deep anterior lamellar keratoplasty (DALK) (n =11), with 89 procedures (80 PKP, 9 DALK) included in the analysis. The mean CDVA improved from 20/59 (0.47 logMAR ± 0.38 [SD]) preoperatively to 20/45 (0.35 ± 0.31 logMAR) postoperatively (P =.013) (n = 46). The mean keratometric astigmatism decreased from 8.26 ± 2.90 diopters (D) preoperatively to 3.62 ± 2.59 D postoperatively (P <.0001) (n = 89). The mean refractive cylinder decreased from 6.77 ± 2.80 D preoperatively to 2.85 ± 2.57 D postoperatively (P <.0001) (n = 69). A nomogram for femtosecond laser AK to treat post-keratoplasty astigmatism was generated using regression analysis. Conclusions Femtosecond laser AK significantly improved UDVA and CDVA and significantly reduced keratometric astigmatism and refractive cylinder after keratoplasty. The nomogram generated should improve the accuracy of post-keratoplasty femtosecond laser AK. Financial Disclosure None of the authors has a financial or proprietary interest in any material or method mentioned.
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U2 - 10.1016/j.jcrs.2015.12.053
DO - 10.1016/j.jcrs.2015.12.053
M3 - Article
C2 - 27113878
AN - SCOPUS:84964540376
SN - 0886-3350
VL - 42
SP - 556
EP - 562
JO - Journal of cataract and refractive surgery
JF - Journal of cataract and refractive surgery
IS - 4
ER -