NCT03749798

Comparing an Intraoperative vs. a Standard Wavefront Device

To Collect and Compare Data With an Intraoperative Wavefront Device (HeLeNa) to a Standard Wavefront Device: an Explorative Pilot Study

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 50 (estimated)
• Sponsor: Prim. Prof. Dr. Oliver Findl, MBA · Academic / Other
• Sex: Female
• Age: 21 Years – 105 Years
• Healthy volunteers: Not accepted

Summary

Comparison of intraoperative measured wavefront data with pre- and post-operative wavefront data.

Detailed description

Different technologies are in use for measuring wavefront aberrations, such as Hartmann-Shack wavefront aberrometry, Tscherning aberrometry, Laser Raytracing and automatic retinoscopy. While Hartmann-Shack wavefront aberrometry, the most widespread of these techniques, uses a lenslet array to record distortions of light bundles coming from a single source form the retina, Tscherning aberrometry uses a matrix of pinholes. Laser Ray Tracing in contrast measures the aberration of a laser beam at different locations. All three systems compare distorsions of the measured light beams with a perfect optical system to calculate the wavefront errors. Repeatability of wavefront devices was studied in young healthy subjects and different devices have been compared to each other. These results do not represent the typical cataract patient. Several factors, such as tear film instability and pupil size, have an influence on the measurements and these factors may change significantly with age. Intraoperative measured data could help to get a better information about wavefront aberrations.

Conditions

• Cataract

Interventions

Type	Name	Description
PROCEDURE	Cataract surgery	Intraoperative wavefront measurements will be carried out during cataract surgery

Timeline

• Start date: 2018-09-01
• Primary completion: 2019-12-01
• Completion: 2019-12-01
• First posted: 2018-11-21
• Last updated: 2018-11-23

Locations

1 site across 1 country: Austria