INDEPENDENCE OF THE TRANSPALPEBRAL SCLERAL TONOMETRY FROM THE THICKNESS OF THE EYELID
2nd GLOBAL OPHTHALMOLOGY SUMMIT 2019
March 27-28, 2019 | Amsterdam, Netherlands
Margarita Rozhdestvenskaya
Tonom GmbH, Germany
Keynote : Ophthalmol Case Rep
Abstract:
Increased intraocular pressure (IOP) is one of the important risk factors
for glaucoma. An accurate IOP assessment is crucial for early detection,
diagnostics and monitoring of glaucoma. Non-corneal IOP measurement
with Diaton tonometer is performed through the eyelid. There are no a
direct contact to the cornea or to the conjunctiva. Diaton tonometer is indicated
for corneal diseases, postoperative conditions of the cornea, for a
bedside diagnosis, etc. Here we examined a dependence of the transpalpebral
scleral tonometry on the thickness of the eyelid in an unexplained
sequence of patients during the consultation.
Methods: 43 patients, 15 males and 28 females (a total of 86 eyes) with age
range from 16 to 80 years old: 51.0 (31.5-69.0) years [median (1st quartile
- 3rd quartile)] was investigated. The eyelid thickness was measured using
the Tomey ultrasound device DU-800. Measurements were performed
sonically by immersion on each eye tarsus-parallel and perpendicular to
the tarsus.
The mean of these two measurements was defined as eyelid thickness.
The IOD measurement on each eye was performed by Diaton (Tonom. Ltd,
Muenster). The data were analyzed with non- parametric statistics.
Results: The average of right eyes IOP was: 15.0 (12.0-17.0) mmHg, left
eyes: 14.0 (12.0-16.0) mmHg, p = 0.605. The average of right eyelids thick-ness was: 0.490 (0.462-0.510) mm and left eyelids: 0.489 (0.467-0.508) mm, p = 0.394. IOD values showed no significant correlation
with the eyelids thickness on the right eyes: ρ = -0.051, p = 0.747; as well as on the left eyes: ρ = - 0.183, p = 0.240.
In addition, no significant correlation of eyelids thickness with age was found: on right eyes: ρ = -0.069, p = 0.662; and on
left eyes: ρ = 0.115, p = 0.463. When the group was divided into two subgroups with low (n = 20, 12.0 (12.0-12.6) mmHg
and high (n = 23, 16.0 (15.5-19.0) mmHg IOP-values (cutoff: 15 mmHg), the average eyelids thicknesses of both subgroups
hardly differed from each other: 0.494 (0.479-0.505) mm vs. 0.489 (0.469-0.503) mm, p = 0.470.
Conclusions: The results of the study demonstrate that in the range of normal IOP values at not pathologically changed
eyelids the non-corneal transpalpebral scleral tonometry does not depend on the thickness of the eyelid. In addition, our
data revealed no significant age-related alterations of eyelid thickness.
Biography:
Margarita Rozhdestvenskaya has an expertise in regulatory strategies, medical device registration standards, quality management system compliance and in-country regulatory representation. From 2013 she is a director of the Tonom GmbH that is the European Authorized representative for Diaton technology. Tonom GmbH fulfills the obligations of the Medical Device Directive MDD 93/42/EEC and acts as legal entity towards the European authorities as well as providing additional services regarding the technical information of the medical devices within the European community. Her expertise and proficiency as well as interest to science, innovation and a culture of operational excellence contribute to offer technology, services and support in order to improve the quality of people’s lives.
E-mail: Margarita_Roz@tonom.de
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