A Comprehensive Assessment of Anterior Corneal Power by Different Devices

Wenzhou Medical University35 enrolled

Overview

To comprehensively assess the precision and agreement of anterior corneal power measurements using 8 different devices.

Volunteers with healthy corneas will be measured by different instruments to detect their anterior corneal power. Only the right eye of each subject was selected. Measurements were repeated in the second session scheduled 1 to 2 weeks later.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Myopia

Interventions

Corneal power measurementDEVICE

All subjects will be underwent a full ophthalmic examination including vision, auto- and subjective refraction, slit-lamp examination, non-contact tonometry, corneal power measurements with the 8 devices and fundus examination.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 55 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * healthy cornea, * best corrected distance visual acuity (BCVA) equal to or better than 20/25, * willing and able to comply with scheduled visits and other study procedures. Exclusion Criteria: * History of refractive surgery or any keratoplasty procedure, * use of contact lenses, * history of corneal dystrophies or degenerative diseases, * history of glaucoma or ocular hypertension, * significant subjective dry eye symptoms, Schirmer I test results of less than 5.0 mm, tear film break-up time shorter than 5 seconds and corneal fluorescein staining positive.

Locations (1)

Wenzhou Medical College

Wenzhou, Zhejiang, China

Outcomes

Primary Outcomes

Flat corneal power

The intrasession repeatability and intersession reproducibility of ﬂat corneal curvature measurements by using the 8 commercially available instruments.

Time frame: 2 weeks

Steep corneal power

The intrasession repeatability and intersession reproducibility of Steep corneal curvature measurements by using the 8 commercially available instruments.

Time frame: 2 weeks

Secondary Outcomes

Vector power J0

The intrasession repeatability and intersession reproducibility of vector power J0 measurements by using the 8 commercially available instruments.

Time frame: 2 weeks

Vector power J45

The intrasession repeatability and intersession reproducibility of vector power J45 measurements by using the 8 commercially available instruments.

Time frame: 2 weeks

Data from ClinicalTrials.gov

This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.