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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 163 - 171 (9page)
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초록· 키워드
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Purpose: To compare the effect of posterior corneal astigmatism on the estimation of total corneal astigmatism using anterior corneal measurements (simulated keratometry [K]) between eyes with keratoconus and healthy eyes. Methods: Thirty-three eyes of 33 patients with keratoconus of grade I or II and 33 eyes of 33 age- and sexmatched healthy control subjects were enrolled. Anterior, posterior, and total corneal cylinder powers and flat meridians measured by a single Scheimpflug camera were analyzed. The difference in corneal astigmatism between the simulated K and total cornea was evaluated. Results: The mean anterior, posterior, and total corneal cylinder powers of the keratoconus group (4.37 ± 1.73, 0.95 ± 0.39, and 4.36 ± 1.74 cylinder diopters [CD], respectively) were significantly greater than those of the control group (1.10 ± 0.68, 0.39 ± 0.18, and 0.97 ± 0.63 CD, respectively). The cylinder power difference between the simulated K and total cornea was positively correlated with the posterior corneal cylinder power and negatively correlated with the absolute flat meridian difference between the simulated K and total cornea in both groups. The mean magnitude of the vector difference between the astigmatism of the simulated K and total cornea of the keratoconus group (0.67 ± 0.67 CD) was significantly larger than that of the control group (0.28 ± 0.12 CD). Conclusions: Eyes with keratoconus had greater estimation errors of total corneal astigmatism based on anterior corneal measurement than did healthy eyes. Posterior corneal surface measurement should be more emphasized to determine the total corneal astigmatism in eyes with keratoconus.
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참고문헌 (23)
참고문헌 신청
Rabinowitz YS / 1998 / Keratoconus / Surv Ophthalmol 42:297~319
Wittig-Silva C / 2014 / A randomized, controlled trial of corneal collagen cross-linking in progressive keratoconus: three-year results / Ophthalmology 121:812~821
Guell JL / 2012 / Collagen crosslinking and toric iris-claw phakic intraocular lens for myopic astigmatism in progressive mild to moderate keratoconus / J Cataract Refract Surg 38:475~484
Eom Y / 2013 / Axis difference between corneal and internal astigmatism to consider for toric intraocular lenses / Am J Ophthalmol 156:1112~1119
Koch DD / 2012 / Contribution of posterior corneal astigmatism to total corneal astigmatism / J Cataract Refract Surg 38:2080~2087
Wittig-Silva C / 2014 / A randomized, controlled trial of corneal collagen cross-linking in progressive keratoconus: three-year results / Ophthalmology 121:812~821
Guell JL / 2012 / Collagen crosslinking and toric iris-claw phakic intraocular lens for myopic astigmatism in progressive mild to moderate keratoconus / J Cataract Refract Surg 38:475~484
Eom Y / 2013 / Axis difference between corneal and internal astigmatism to consider for toric intraocular lenses / Am J Ophthalmol 156:1112~1119
Koch DD / 2012 / Contribution of posterior corneal astigmatism to total corneal astigmatism / J Cataract Refract Surg 38:2080~2087
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