플라시도원반 방식의 비디오각막경을 이용한 각막곡률 및 난시측정과 기존의 각막곡률계와의 비교
Measurement of Corneal Power and Astigmatism Using Placido-based Videokeratography and Comparison with Other Keratometers
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
목적: 플라시도 원반 방식의 비디오각막경을 이용한 각막곡률 및 난시측정의 임상적 유용성을 평가하고 기존의 각막곡률을 측정할 수 있는 기기들과의 차이가 있는지 알아보고자 하였다. 대상과 방법: 2015년 11월부터 2016년 1월까지 백내장 수술이 예정된 45명 45안을 전향적으로 조사하였다. 플라시도 원반 방식의 비디오각막경(Keratograph® 5M), 자동각막곡률계(KR-8900®), 수동각막곡률계(B&L Manual Ophthalmic Keratometer®), 플라시도원반-세극등주사 각막곡률계(ORBscan II®), 샤임플러그 각막곡률계(Pentacam®) 및 저간섭성 반사계(Lenstar®)를 이용하여 각막곡률 및 난시를 기기당 1안에 3회씩 반복 측정하였다. 기기별 반복성 및 신뢰성 비교는 변동계수, 표준편차 및 군내연관계수를 통해 분석하였고 기기 간 측정치 평균 차이 비교는 반복측정 분산분석을 통해, 일치도 평가는 Bland-Altman plot으로 분석하였다. 결과: 평균각막곡률 및 각막난시의 측정에 있어 Keratograph® 5M과 다른 기기 간의 차이는 없었으며, J0, J45에서도 통계적으로 유의한 차이는 보이지 않았다(p>0.05). Bland-Altman plot으로 분석한 Keratograph® 5M과 다른 기기 간 일치도에서 95% limits of agreement (LoA) 값이 각막곡률은 -0.78~0.55D로, J0은 -0.72~0.88D로, J45는 -0.39~0.47D로 나타났다. 결론: 각막곡률 및 난시의 측정에 있어 Keratograph® 5M은 기존의 각막곡률계와 비교하여 서로 비슷한 재현성을 나타냈으며 다른 기기들과 상호보완적으로 이용될 수 있다.
Abstract
Purpose: In the present study, the repeatability and reproducibility of the corneal power and astigmatism measurements using placido-based video keratography were evaluated and the agreement with other keratometers were compared. Methods: This prospective study included 45 patients (45 eyes) scheduled to undergo cataract surgery between November 2015 and January 2016. Three sets of corneal power and astigmatism were measured using placido-based video keratometer (Keratograph® 5M), automatic keratometer (KR-8900®), manual keratometer (B&L manual keratometer®), Placido-scanning-slit keratometer (ORBscan II®), Scheimpflug keratometer (Pentacam®), and low coherence interferometry (Lenstar LS900®). Reliability of each device was analyzed using the coefficient of variation, standard deviation and intraclass correlation coefficient. Repeated measures analysis of variance was used to analyze the interdevice comparison of mean absolute difference. The agreement between the devices was evaluated with 95% limits of agreement (LoA) and Bland-Altman plots. Results: The mean corneal power, astigmatism and power vector analysis (J0, J45) were not significantly different among devices (p > 0.05). In the Bland-Altman plot analysis, the 95% LoA of corneal power, J0, and J45 when comparing Keratograph® 5M with others ranged from -0.78 to 0.55 D, from -0.42 to 0.45 D, and from –0.39 to 0.47 D, respectively. Conclusions: Keratograph® 5M showed good repeatability and reproducibility of corneal power and astigmatism measurements and was interchangeable with other keratometers.
참고문헌 (30)
- Qazi MA., "Determining corneal power using Orbscan II videokeratography for intraocular lens calculation after excimer laser surgery for myopia", J Cataract Refract Surg, 33, pp.21~30 (2007)
- Elbaz U., "Comparison of different techniques of anterior chamber depth and keratometric measurements", Am J Ophthalmol, 143, pp.48~53 (2007)
- Elliott M., "Repeatability and accuracy of automated refraction : a comparison of the Nikon NRK-8000, the Nidek AR-1000, and subjective refraction", Optom Vis Sci, 74, pp.434~438 (1997)
- Holzer MP., "Accuracy of a new partial coherence interferometry analyser for biometric measurements", Br J Ophthalmol, 93, pp.807~810 (2009)
- 최재혁, "IOL Master로 측정된 생체 계수의 재현성과 정확성", 대한안과학회지, 45(10), pp.10~10 (2004), 대한안과학회
- Findl O., "Improved prediction of intraocular lens power using partial coherence interferometry", J Cataract Refract Surg, 27, pp.861~867 (2001)
- Findl O., "High precision biometry of pseudophakic eyes using partial coherence interferometry", J Cataract Refract Surg, 24, pp.1087~1093 (1998)
- 김소윤, "여러 가지 기기에서의 각막곡률 비교", 대한안과학회지, 53(5), pp.618~625 (2012), 대한안과학회[DOI]
- Thibos LN., "Power vectors : an application of Fourier analysis to the description and statistical analysis of refractive error", Optom Vis Sci, 74, pp.367~375 (1997)
- Jiang Y., "Noninvasive Keratograph assessment of tear film break-up time and location in patients with age-related cataracts and dry eye syndrome", J Int Med Res, 42, pp.494~502 (2014)
- Best N., "Clinical evaluation of the Oculus Keratograph", Cont Lens Anterior Eye, 35, pp.171~174 (2012)
- Srinivasan S., "Infrared imaging of meibomian gland structure using a novel keratograph", Optom Vis Sci, 89, pp.788~794 (2012)
- Wu S., "Assessment of bulbar redness with a newly developed keratograph", Optom Vis Sci, 92, pp.892~899 (2015)
- Wang X., "Evaluation of dry eye and meibomian gland dysfunction in teenagers with myopia through noninvasive keratograph", J Ophthalmol, 2016, pp.6761206~ (2016)
- Tian L., "Repeatability and reproducibility of noninvasive keratograph 5M measurements in patients with dry eye disease", J Ophthalmol, 2016, pp.8013621~ (2016)
- Abdelfattah NS., "Noninvasive imaging of tear film dynamics in eyes with ocular surface disease", Cornea, 34(Suppl 10), pp.S48~S52 (2015)
- Ngo W., "Repeatability of grading meibomian gland dropout using two infrared systems", Optom Vis Sci, 91, pp.658~667 (2014)
- Mao X., "Repeatability, reproducibility, and agreement of corneal power measurements obtained with a new corneal topographer", J Cataract Refract Surg, 39, pp.1561~1569 (2013)
- Ventura BV., "Repeatability and comparability of corneal power and corneal astigmatism obtained from a point-source color light-emitting diode topographer, a Placido-based corneal topographer, and a low-coherence reflectometer", J Cataract Refract Surg, 41, pp.2242~2250 (2015)
- Kawamorita T., "Repeatability, reproducibility, and agreement characteristics of rotating Scheimpflug photography and scanning-slit corneal topography for corneal power measurement", J Cataract Refract Surg, 35, pp.127~133 (2009)
- 신영주, "두 가지 각막지형도 검사에서의 각막 측정값 비교", 대한안과학회지, 48(5), pp.637~641 (2007), 대한안과학회
- Menassa N., "Comparison and reproducibility of corneal thickness and curvature readings obtained by the Galilei and the Orbscan II analysis systems", J Cataract Refract Surg, 34, pp.1742~1747 (2008)
- Laursen JV., "Precision of 5 different keratometry devices", Int Ophthalmol, 36, pp.17~20 (2016)
- 한정모, "자동각막굴절계, IOL Master, 각막지형도의 각막굴절력 및 각막난시 측정의 비교 분석", 대한안과학회지, 52(12), pp.1427~1433 (2011), 대한안과학회
- Srivannaboon S., "Comparison of corneal astigmatism and axis location in cataract patients measured by total corneal power, automated keratometry, and simulated keratometry", J Cataract Refract Surg, 38, pp.2088~2093 (2012)
- Tajbakhsh Z., "Comparison of keratometry measurements using the Pentacam HR, the Orbscan IIz, and the TMS-4 topographer", Ophthalmic Physiol Opt, 32, pp.539~546 (2012)
- Shirayama M., "Comparison of corneal powers obtained from 4 different devices", Am J Ophthalmol, 148, pp.528.e1~535.e1 (2009)
- Dehnavi Z., "Comparison of the corneal power measurements with the TMS4-topographer, Pentacam HR, IOL master, and Javal keratometer", Middel East Afr J Ophthalmol, 22, pp.233~237 (2015)
- Gonen T., "Comparison of keratometric data obtained by automated keratometer, Dicon CT 200, Allegro Topolyzer, and Pentacam", J Refract Surg, 28, pp.557~561 (2012)
- Mejia-Barbosa Y., "A review of methods for measuring corneal topography", Optom Vis Sci, 78, pp.240~253 (2001)