Central Corneal Thickness and Corneal Hysteresis During Corneal Swelling Induced by Contact Lens Wear With Eye Closure

Liu, Fan; Xu, Suzhong; Qu, Jia; Shen, Meixiao; Wang, Xiaoxing; Fang, Haizhen; Wang, Jianhua

doi:10.1016/j.ajo.2006.12.031

Cited by 85 publications

(72 citation statements)

References 13 publications

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“…Although CH is moderately correlated with CCT, CH and corneal compensated IOP measurements are less affected by corneal oedema than are GAT measurements. 33,37,38 Furthermore, IOPcc may be one of the most appropriate measures of IOP before and after keratorefractive procedures and in eyes with keratoconus or corneal oedema. 14,[33][34][35][36]39 In light of these and other findings, the ORA is an appealing tool for the measurement of IOP and ocular biomechanical characteristics.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of agreement between intraocular pressure measurements using Goldmann applanation tonometry and Goldmann correlated intraocular pressure by Reichert's ocular response analyser

Ehrlich

Haseltine

Shimmyo

et al. 2010

Eye

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Purpose To compare agreement of intraocular pressure (IOP) measurements using Goldmann applanation tonometry (GAT) and Goldmann correlated intraocular pressure generated (IOPg) by the Reichert ocular response analyser (ORA). Methods Consecutive patients presenting for glaucoma evaluation underwent ORA assessment followed by examination including GAT. For each ORA assessment, measurements were taken until a waveform score (WS) of 6.5 was obtained or until five measurements were obtained per eye. The relationship between GAT and IOPg and the influence of the WS upon this relationship was evaluated. A Bland-Altman plot and linear regression were used to determine agreement between GAT and IOPg. Results A total of 518 eyes of 260 patients were included in the final analysis. Increasing WS was found to predict a smaller difference between GAT and IOPg (b ¼ À0.2, Pp0.001). Selecting the highest WS among ORA assessments of each eye, WS continued to predict concordance between GAT and IOPg (b ¼ À0.2, P ¼ 0.006). The mean IOP difference between methods was 0.1 mm Hg (±0.3), which was found to be statistically insignificant (P ¼ 0.391). This relationship between GAT and IOPg was successfully validated using a second distinct data set of 100 eyes. GAT and IOPg measurements varied by 2 mm Hg or less in 53.9% of eyes and 5 mm Hg or less in 92.3% of eyes. Conclusion In clinical practice IOPg is strongly related to GAT. Although higher WS is indicative of greater IOPg/GAT concordance, its influence is minimal. This study does not support the use of a specific WS cutoff to determine quality of an IOPg measurement.

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Section: Discussionmentioning

confidence: 99%

Evaluation of agreement between intraocular pressure measurements using Goldmann applanation tonometry and Goldmann correlated intraocular pressure by Reichert's ocular response analyser

Ehrlich

Haseltine

Shimmyo

et al. 2010

Eye

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show abstract

“…15,[19][20][21] Briefly, the OCT system was modified by adding a set of lenses on the probe to focus the OCT beam to obtain high quality imaging of the central cornea. The scan width was set at 3 mm and the actual scan width with the adapter was measured to be 3 mm.…”

Section: Instrumentationmentioning

confidence: 99%

“…15,[19][20][21][22] Briefly, central 21 axial scans were aligned by the first peak and averaged to generate a reflectivity profile. The corneal thickness was defied in this profile as the distance between the first and last peaks.…”

Section: Instrumentationmentioning

confidence: 99%

Association between corneal biomechanical properties and myopia in Chinese subjects

Jiang

Shen

Mao

et al. 2011

Eye

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Purpose To examine the relationship between corneal biomechanical properties and the degree of myopia. Methods Chinese subjects (n ¼ 172, age: 11À65 years) were divided into diagnostic groups with non-myopia (spherical equivalence (SE)4À0.50 D), low (À3.00rSErÀ0.50 D), moderate (À6.00rSEoÀ3.00 D), and high myopia (SEoÀ6.00 D). Only the right eye of each subject was analyzed. Central corneal thickness (CCT) was measured by optical coherence tomography. An ocular response analyzer was used to measure corneal hysteresis (CH), corneal resistance factor (CRF), intraocular pressure (IOP), and corneal compensated IOP (IOPcc). Refraction was measured by both automated and subjective refractometry and expressed as SE. Results CH was significantly lower in high myopia compared with both low and non-myopia (Pr0.002). CCT was 1.5 times more correlated to CH variation compared with refraction. Similarly, CRF was four times more dependent on CCT than refraction. CH (Po0.001) or CRF (P ¼ 0.005) was positively correlated to refraction. Both IOP and IOPcc were negatively correlated to refraction (Po0.001), respectively. Conclusions CH decreases only in high myopia. Refraction is positively correlated to both CH and CRF but negatively correlated to both IOP and IOPcc. These results indicate that the mechanical strength in anterior segment of the eye is compromised in high myopia. In addition, high myopia may increase the risk of glaucoma.

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“…Sağlıklı kornealar üzerinde yapılan bir çalışmada, korneada hipoksi oluşturacak şekilde lens kullanımının kornea biyomekaniğinde değişikliklere yol açtığı gösterilmiştir. 4 Bu noktadan hareketle, keratokonus hastalarında uzun süreli SGG lens kullanımının yaratacağı olası kronik korneal hipoksi ve ödemin korneanın biyomekanik yapısında birtakım değişikliklere yol açabileceğini, ayrıca SGG kontakt lensin korneada yarattığı mekanik bası etkisinin uzun dönemde, korneanın viskoelastik özelliklerini etkileyebileceğini düşünmek mümkündür.…”

Section: Gi Riflunclassified

Keratokonus Hastalarında Kontakt Lens Kullanımının Korneal Biyomekanik Parametreler Üzerine Etkisi

...

2012

Tjo

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Central Corneal Thickness and Corneal Hysteresis During Corneal Swelling Induced by Contact Lens Wear With Eye Closure

Cited by 85 publications

References 13 publications

Evaluation of agreement between intraocular pressure measurements using Goldmann applanation tonometry and Goldmann correlated intraocular pressure by Reichert's ocular response analyser

Evaluation of agreement between intraocular pressure measurements using Goldmann applanation tonometry and Goldmann correlated intraocular pressure by Reichert's ocular response analyser

Association between corneal biomechanical properties and myopia in Chinese subjects

Keratokonus Hastalarında Kontakt Lens Kullanımının Korneal Biyomekanik Parametreler Üzerine Etkisi

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