Comparison of Goldmann applanation and dynamic contour tonometry measurements: Effects of corneal morphometry

Sáenz-Francés, F.; García-Catalán, R.; Jerez-Fidalgo, M.; Fernandez-Vidal, Ana; Martínez-de-la-Casa, J.M.; Méndez-Hernández, Carmen; Santos-Bueso, E.; Reche-Frutos, J; García–Sánchez, J.; García‐Feijoó, Julián

doi:10.1016/j.oftale.2011.04.007

Cited by 5 publications

(5 citation statements)

References 22 publications

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“…40 Similarly, DCT measurements were not significantly correlated with CCT (P = 0.36) with an average increase in IOP by 0.8 mm Hg for a 100 mm increase in CCT, which is compatible with earlier studies reporting a low effect of CCT on DCT-IOP measurements. 31,42 Following a period in which attention has been limited to CCT, there is now growing appreciation that it is corneal stiffness, more than the parameters affecting it such as CCT, that should be considered when improving accuracy of IOP measurement. 6,13 Corneal stiffness is influenced by both geometric parameters (eg, thickness, curvature, diameter, and astigmatism) and material parameters (which vary with age and medical history).…”

Section: Discussionmentioning

confidence: 99%

Clinical Evaluation of Methods to Correct Intraocular Pressure Measurements by the Goldmann Applanation Tonometer, Ocular Response Analyzer, and Corvis ST Tonometer for the Effects of Corneal Stiffness Parameters

Bao

Huang

et al. 2016

Journal of Glaucoma

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Section: Discussionmentioning

confidence: 99%

Clinical Evaluation of Methods to Correct Intraocular Pressure Measurements by the Goldmann Applanation Tonometer, Ocular Response Analyzer, and Corvis ST Tonometer for the Effects of Corneal Stiffness Parameters

Bao

Huang

et al. 2016

Journal of Glaucoma

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“…7 Sáenz-Francés ve ark.nın yaptığı bir çalışmaya göre, GAT ölçüm sonuçları SKK'den etkilenirken, PDKT öl-çümlerinin kornea morfometresinden bağımsız olduğu saptanmıştır. 8 GAT'ın kalibrasyonunda standart bir SKK (520 µm) kabul edilmektedir. 4 Ehlers ve ark., 520 µm'lik değerden her 10 µm'lik sapmanın 0,7 mmHg'lik bir yanlış ölçmeye neden olabileceğini hesaplamışlardır.…”

Section: Discussionunclassified

The Analysis of Central Corneal Thickness and Intraocular Pressure Measurements with Different Types of Tonometers

Marangoz¹,

Kohen²,

Altunsoy³

et al. 2017

Turkiye Klinikleri J Ophthalmol

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lokomun en önemli risk faktörü göz içi basıncı (GİB) yüksekliğidir. 1 GİB'in doğru olarak ölçümü glokom risk değerlendirmesi ve izleminde çok önemli bir klinik testtir. Günümüzde GİB ölçümü için farklı tonometreler uygulanmakta ise de Goldmann aplanasyon tonometresi (GAT) GİB ölçümünde "altın standart" olarak kabul edilmektedir.2 Fakat GAT ile yapılan GİB ölçümü, başta santral kornea kalınlığı (SKK) olmak üzere; gözyaşı film tabakası, korneal kurvatürü ve oküler rijiditeden etkilenmektedir.3 GAT'ın kalibrasyonunda standart bir SKK (520 µm) kabulTurkiye Klinikleri J Ophthalmol 2017;26(3):193-7 193 Farklı Tonometreler ile Yapılan Göz İçi Basıncı Ölçümlerinin Kornea Kalınlığına Göre Analizi Ö ÖZ ZE ET T A Am ma aç ç: : Icare tonometresi, Goldmann aplanasyon tonometresi (GAT), oküler yanıt analizörü (ORA), Pascal dinamik kontür tonometresi (PDKT), Tono-Pen, Air-puff tonometrelerinin kornea kalınlıklarına göre göz içi basıncı (GİB) ölçüm değerlerindeki farklılıklar incelendi. G Ge er re eç ç v ve e Y Yö ön n--t te em ml le er r: : Sağlıklı 37 hastanın 74 gözü çalışma kapsamına alındı. Olguların santral kornea kalınlıkları ve altı farklı tonometre ile göz içi basınç (GİB) ölçümleri yapıldı. Kornea kalınlığı 550 µm'nin altında (Grup A) ve 550 µm ve üstünde (Grup B) olanlardan elde edilen GİB sonuçları istatistiksel olarak karşılaştırıldı. B Bu ul lg gu ul la ar r: : Grup A'da Icare, Tono-Pen ve Air-puff ölçümleri arasında anlamlı bir fark saptanamaz iken (p>0,05); diğer yandan ORA, GAT, PDKT ölçümleri arasında anlamlı bir fark bulunmuştur (p<0,05). Grup B'de ise Icare ile Tono-Pen, Air-puff, ORA, GAT, PDKT ölçümleri arasında anlamlı bir fark belirlenmiştir (p<0,05). S So on nu uç ç: : Özellikle ince kornealı hastalarda Pascal dinamik kontür tonometresi, Tono-Pen ve Icare tonometreleri daha güvenilir GİB ölçümü sağlamaktadır.A An na ah ht ta ar r K Ke el li im me el le er r: : İntraoküler basınç; tonometri, göz

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“…Its function is better described by the Pascal principle, referring to an equality of pressures acting on the anterior corneal surface at the time of measurement: where ‘IOP’ is the actual aqueous pressure, ‘r’ refers to OR, ‘c’ to capillary attraction and ‘ap’ to a potential appositional element 34 . Several previous studies have examined the differences between DCT and GAT measurements in various clinical situations 9,31,35–38 . Although on the average the former yields slightly higher IOP readings than the latter 9,31 (1.5–1.7 mmHg), an increased disparity in IOP readings between GAT and DCT has been reported in situations such as a very high or very low central corneal thickness value 31 in glaucomatous eyes under latanoprost treatment 9 or in pseudoexfoliation syndrome 35 .…”

Section: Orand Iop Measurementsmentioning

confidence: 99%

“…34 Several previous studies have examined the differences between DCT and GAT measurements in various clinical situations. 9,31,[35][36][37][38] Although on the average the former yields slightly higher IOP readings than the latter 9,31 (1.5-1.7 mmHg), an increased disparity in IOP readings between GAT and DCT has been reported in situations such as a very high or very low central corneal thickness value 31 in glaucomatous eyes under latanoprost treatment 9 or in pseudoexfoliation syndrome. 35 Because the deformation (appositional element) is much less in DCT, compared with GAT (Fig.…”

Section: Or and Iop Measurementsmentioning

confidence: 99%

Ocular rigidity: biomechanical role, in vivo measurements and clinical significance

Detorakis

Pallikaris

2012

Clinical Exper Ophthalmology

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Ocular rigidity (OR) refers to the relationship between pressure and volume changes in the eyeball. Since the description of the differential tonometry method for the calculation of an OR coefficient by Friedenwald, several other methodologies have been proposed to measure OR, including the anterior chamber manometry, axial length (AL) changes, measurement of pulse amplitude and fundus pulse, ultrasound elastography and evaluation of corneal hysteresis. However, most of these methodologies suffer from deficiencies, such as invasive nature, poor accuracy or reproducibility or technical complexity. Nevertheless, it is possible that OR affects the pathogenesis and clinical course of a variety of ocular conditions, including glaucoma, age-related macular degeneration, presbyopia, corneal changes following refractive surgery as well as the accuracy of IOP measurements by many tonometers. Thus, the future development of non-invasive and easy-to-use methodologies for the accurate measurement of OR in the every-day practice would be clinically important.

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Comparison of Goldmann applanation and dynamic contour tonometry measurements: Effects of corneal morphometry

Cited by 5 publications

References 22 publications

Clinical Evaluation of Methods to Correct Intraocular Pressure Measurements by the Goldmann Applanation Tonometer, Ocular Response Analyzer, and Corvis ST Tonometer for the Effects of Corneal Stiffness Parameters

Clinical Evaluation of Methods to Correct Intraocular Pressure Measurements by the Goldmann Applanation Tonometer, Ocular Response Analyzer, and Corvis ST Tonometer for the Effects of Corneal Stiffness Parameters

The Analysis of Central Corneal Thickness and Intraocular Pressure Measurements with Different Types of Tonometers

Ocular rigidity: biomechanical role, in vivo measurements and clinical significance

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