목적: Acrysof IQ Panoptix toric TFNT 인공수정체(IOL)에 대한
Swept-Source 광 간섭 단층 촬영 기반 생체 측정과 회전하는 Scheimpflug 단층 촬영에서
총 각막 도수 계산의 정확도를 평가하기 위함이다.
방법: TFNT IOL을 삽입한 145안을 대상으로 후향적 연구를 시행하였다.
SS-OCT 기반 생체 측정기(IOLMaster 700, total keratometry [TK])와 회전하는
Scheimpflug 단층 촬영기(total corneal refractive power 3 mm [TCRP3]와 4 mm [TCRP4])를 비교했다.
VectrAK 분석 프로그램(ASSORT)을 이용하여 수술적으로 유도된 난시 벡터(Surgically induced astigmatism vector),
차이 벡터(Difference vector), 벡터 각도(Angle of vector), 보정 지수(Correction index), 성공 지수(Index of success),
조정 계수(Coefficient of adjustment) 및 편평 지수(Flattening index)를 분석하였다.
결과: Index of success는 세 가지 방법 사이에 유의한 차이를 보였다(P = .035, 분산분석 검정).
Index of success의 평균±표준편차는 TK(0.43±0.20)가 가장 높았고 TCRP4(0.47±0.24, P=.400, Bonferroni HSD test),
TCRP3(0.50±0.22, P=.030, Bonferroni HSD test) 순이었다.
수술 전 굴절난시 예측오차는 TCRP4 62안(42.8%), TK 66안(45.5%)에서 ±0.50디옵터(D) 이내였다.
결론: 이 연구 결과는 TCRP4와 TK의 총 각막 굴절력을 이용한
TFNT 삽입의 굴절 정확도가 유의함을 시사한다.
Purpse : To evaluate the accuracy of total corneal power calculation from a swept-source optical coherence
tomography–based biometer and a rotating Scheimpflug tomographer for the Acrysof IQ Panoptix toric TFNT
intraocular lens (IOL) (Alcon Labroatories, Inc).
Methods : A retrospective study was undertaken on 145 eyes implanted with the TFNT IOL. The accuracy of total
corneal power calculation from a SS-OCT–based biometer (IOLMaster 700; Carl Zeiss Meditec AG; total keratometry
[TK]) and a rotating Scheimpflug tomographer (Oculus Optikgeräte GmbH; total corneal refractive power at 3 mm [TCRP3]
and at 4 mm [TCRP4]) were compared. The surgically induced astigmatism vector,
difference vector, angle of vector, correction index, index of success, coefficient of adjustment,
and flattening index were analyzed using the VectrAK analysis program (ASSORT).
Results: The index of success showed a significant difference between the three methods (P = .035, analysis of variance test).
The mean ± standard deviation of the index of success was the best in TK (0.43 ± 0.20),
followed by TCRP4 (0.47 ± 0.24, P = .400, Bonferroni HSD test) and TCRP3 (0.50 ± 0.22, P = .030, Bonferroni HSD test).
The preoperative refractive astigmatism prediction error was within ±0.50 diopters (D) in 62 eyes (42.8%) when using
TCRP4 and in 66 eyes (45.5%) when using TK.
Conclusion: These study results suggest that the refractive accuracy of TFNT implantation
using total corneal power from TCRP4 and TK was favorable.