The Effect of Corneal Edema on Dynamic Contour and Goldmann Tonometry

Hamilton, K.E.; Pye, David; Kao, Lawrence; Pham, Nhung; Tran, An-Quyen Nguyen

doi:10.1097/opx.0b013e3181783a86

Cited by 33 publications

(32 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They used contact lenses for inducing corneal edema, as we did in our study, and reported that the CCT (40.2∼54.1 μm) and the IOP measurements of the GAT (1.5∼2.8 mmHg) increased after 2 hours of wearing contact lenses. In the study using DCT, there was a significant decrease in IOP measurements (-0.7±1.1 mmHg) after wearing contact lenses, as was the case in our study [10]. We couldn't clearly explain the different results on the effect of contact lens-induced corneal edema on the GAT measurements.…”

Section: Discussioncontrasting

confidence: 71%

“…However, Hamilton et al recently reported on the effect of contact lens-induced corneal edema on the GAT measurements [8,9,10]. They used contact lenses for inducing corneal edema, as we did in our study, and reported that the CCT (40.2∼54.1 μm) and the IOP measurements of the GAT (1.5∼2.8 mmHg) increased after 2 hours of wearing contact lenses.…”

Section: Discussionsupporting

confidence: 53%

See 1 more Smart Citation

The effect of contact lens-induced corneal edema on Goldmann applanation tonometry and dynamic contour tonometry

Yoo

Kim

et al. 2008

Graefes Arch Clin Exp Ophthalmol

View full text Add to dashboard Cite

show abstract

Section: Discussioncontrasting

confidence: 71%

Section: Discussionsupporting

confidence: 53%

The effect of contact lens-induced corneal edema on Goldmann applanation tonometry and dynamic contour tonometry

Yoo

Kim

et al. 2008

Graefes Arch Clin Exp Ophthalmol

View full text Add to dashboard Cite

show abstract

“…Similarly to our results, recent studies demonstrated that contact lenses induce corneal edema and cause statistically significant differences in IOP values with and without contact lens using GAT and DCT. 14,15 In our study, we obtained the highest IOP value with Pascal DCT and the next highest with NCT. GAT measurements were the lowest of all.…”

Section: Discussionsupporting

confidence: 55%

The influence of soft contact lenses on the intraocular pressure measurement

Fırat

Çankaya

Doğanay

et al. 2011

Eye

View full text Add to dashboard Cite

Purpose To evaluate the influence of silicone hydrogel contact lenses on the intraocular pressure (IOP) measurement using Goldmann applanation tonometry (GAT), non-contact tonometry (NCT), and Pascal dynamic contour tonometry (DCT). Methods We included in the study 40 eyes of 40 patients who did not have any ocular or systemic diseases or contraindications to contact lens use. We measured and recorded the IOP values of each patient using NCT without and with contact lenses (groups 1 and 2, respectively), using DCT without and with contact lenses (groups 3 and 4, respectively), and using GAT without contact lenses (group 5). Results The mean IOP value of group 1 was 14.55±2.95 mm Hg and 13.92±2.58 mm Hg in group 2. We detected no statistically significant difference between group 1 and group 2 (P ¼ 0.053). The mean IOP values for group 3 and group 4 were 16.26 ± 2.33 mm Hg and 15.19 ± 2.40 mm Hg, respectively. We detected a statistically significant difference between groups 3 and 4 (P ¼ 0.005).

show abstract

“…15,16,66 It is a useful tool in situations where the clinician suspects inaccurate IOP measurements that could be caused by corneal biomechanical properties. It is particularly accurate in eyes with keratoconus, 20,21,67 corneal edema, 68 and those that have undergone penetrating keratoplasty 21,22,69 and refractive surgery. 25,70 The DCT provides a score (Q) representing the quality of the IOP measure.…”

Section: Dynamic Contour Tonometry -Pascal Tonometer (Smt Swiss Micromentioning

confidence: 99%

Modalities of Tonometry and their Accuracy with Respect to Corneal Thickness and Irregularities

Moraes

Prata

Liebmann

et al. 2008

Journal of Optometry

View full text Add to dashboard Cite

Recent advances in tonometry have led to the development of a number of devices with differing clinical applications. Their role in cases of abnormal corneal thickness and surface irregularities is particularly important, as inaccurate estimation of the true intraocular pressure (IOP) in such cases may lead to suboptimal evaluation. The purpose of the present review was to evaluate the accuracy of the most widely used devices in cases of corneal thickness and surface irregularities, based on a survey of the published literature. The analysis was based on a Medline search focusing mainly on papers that have evaluated the devices' accuracy with respect to corneal thickness and irregularities. Nine device types (Goldmann tonometer, Tono-Pen, Perkins tonometer, Ocular Response Analyzer, non-contact tonometer, pneumatonometer, I-Care rebound tonometer, Pascal dynamic contour tonometer (DCT) and Phosphene tonometer) were described in detail. Moreover, the physical principles and major utility of each tonometer were compared. Each of the many different commercially available tonometers has specific advantages and disadvantages. New non-invasive technologies are getting closer to a precise estimation of the true IOP. However, among all tonometers, none is highly accurate when both corneal thickness and surface irregularities are present. Fifty years after its development, Goldmann tonometry remains the gold standard to which all other devices are compared. RESUMENAvances recientes en el campo de la tonometría han propiciado el desarrollo de diversos dispositivos con diferentes aplicaciones clíni-cas. Resulta de particular importancia el papel que juegan en el caso de espesores corneales anormales o en presencia de irregularidades en la superficie de la córnea, puesto que, en esos casos, una medida imprecisa de la presión intraocular (PIO) real puede traer como consecuencia una valoración incorrecta del caso. El objetivo de esta revisión es evaluar el grado de precisión de los dispositivos más utilizados hoy en día en casos en los que existen irregularidades en la superficie de la córnea o en el espesor corneal. Para ello, se llevó a cabo una búsqueda de datos entre los artículos publicados. El análisis estuvo basado en una búsqueda bibliográfica realizada dentro de Medline, centrándose principalmente en aquellos artícu-los científicos que habían estudiado el grado de precisión del dispositivo en función del espesor corneal del paciente y de la presencia o no de irregularidades corneales. Se describen en detalle nueve tipos de dispositivos: tonómetro de Goldmann, Tono-Pen, tonómetro de Perkins, Ocular Response Analyzer, tonómetro sin contacto, neumotonómetro, tonómetro de rebote I-Care, tonómetro de contorno dinámico Pascal y tonómetro de fosfeno. Además, se presentan de forma comparada los principios físicos en los que está basado cada tonómetro y las situaciones en las que cada uno resulta de mayor utilidad. Cada uno de los distintos tonómetros disponibles en el mercado presenta ventajas y desventajas respecto...

show abstract

The Effect of Corneal Edema on Dynamic Contour and Goldmann Tonometry

Cited by 33 publications

References 34 publications

The effect of contact lens-induced corneal edema on Goldmann applanation tonometry and dynamic contour tonometry

The effect of contact lens-induced corneal edema on Goldmann applanation tonometry and dynamic contour tonometry

The influence of soft contact lenses on the intraocular pressure measurement

Modalities of Tonometry and their Accuracy with Respect to Corneal Thickness and Irregularities

Contact Info

Product

Resources

About