Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

[Contact glass tonometer]

P W Dekker1, H Kanngiesser, Y C Robert

  • 1Universitäts-Augenklinik Zürich.

Klinische Monatsblatter Fur Augenheilkunde
|May 1, 1996
PubMed
Summary
This summary is machine-generated.

A novel contact lens tonometer accurately measures intraocular pressure and enables simultaneous ophthalmoscopy. This device offers continuous pulse monitoring, aiding in early glaucoma diagnosis and optic disc pressure tolerance assessment.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

[Continuous intraocular pressure measurement: First results with a pressure-sensitive contact lens].

Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·2009
Same author

[Tonometry in change. From indentation and applanation to contour adaptation].

Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·2005
Same author

[Lacrimal duct endoscopy with the rigid GRIN endoscopy].

Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·2000
Same author

[Rigid GRIN-endoscope for endoscopy of the tear ducts].

Klinische Monatsblatter fur Augenheilkunde·2000
Same author

[Ocular hemoglobinometry--physiological variations].

Klinische Monatsblatter fur Augenheilkunde·2000
Same author

Principles of contact lens tonometry.

International ophthalmology·1999
Same journal

Corneal Neurotisation in Neurotrophic Keratopathy: A Retrospective Analysis of Functional Outcomes and Clinical Courses.

Klinische Monatsblatter fur Augenheilkunde·2026
Same journal

Evaluating the Long-term Success and Safety of Canaloplasty in Glaucoma Patients.

Klinische Monatsblatter fur Augenheilkunde·2026
Same journal

Imbalanced Trace Elements as Risk Factors in the Pathogenesis of Glaucoma.

Klinische Monatsblatter fur Augenheilkunde·2026
Same journal

Malnutrition as a Risk Factor for Cerebral and Glaucomatous Neurodegeneration - Mechanisms and Therapeutic Strategies.

Klinische Monatsblatter fur Augenheilkunde·2026
Same journal

Impact of Wearing a Face Mask on the Reliability of Standard Automated Perimetry in Glaucoma Patients and Suspects: a Retrospective Longitudinal Study.

Klinische Monatsblatter fur Augenheilkunde·2026
Same journal

[Siderotic Cataract Eight Months After Intralenticular Metallic Foreign Body: A Case Report and Surgical Management].

Klinische Monatsblatter fur Augenheilkunde·2026
See all related articles

Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Medical Devices

Background:

  • A new contact lens tonometer (CGT) integrates intraocular pressure measurement with ophthalmoscopy.
  • The device allows simultaneous monitoring of eye pressure changes and fundus visualization.
  • Continuous pulse-curve recording can detect circulatory issues, aiding in early glaucoma detection.

Purpose of the Study:

  • To develop and validate a contact lens-based tonometer for simultaneous intraocular pressure measurement and ophthalmoscopy.
  • To assess the device's capability for continuous pulse monitoring and its diagnostic potential for glaucoma.
  • To evaluate the ease of use for oculodynamometry and optic disc pressure tolerance estimation.

Main Methods:

  • Measurements were conducted on enucleated human eyes, comparing the CGT with a Statham-transducer.

Related Experiment Videos

  • Further validation involved 65 healthy volunteers, comparing the CGT against Perkins-Tonometry.
  • Correlation analysis was performed to assess measurement accuracy.

    • Main Results:

    • A strong correlation (R = 0.999) was observed in studies with enucleated human eyes.
    • Measurements on healthy volunteers showed a correlation of R = 0.58 with Perkins-Tonometry.
    • The contact lens tonometer demonstrated an error margin of approximately +/- 3 mm Hg.

    Conclusions:

    • The contact lens tonometer accurately measures intraocular pressure, validated by comparisons with established methods.
    • The device shows promise for early glaucoma diagnosis by providing simultaneous pressure and fundus imaging.
    • Future research will focus on analyzing the dynamic components of the measurements.