NCT01295164

Measurement of High Order Aberrations in Late Stages Keratoconus

Feasibility of Measurement of High Order Aberrations in Late Stages Keratoconus by Using an Adaptive Optics Visual Simulator AOVIS-I

• Status: Terminated
• Phase: N/A
• Study type: Interventional
• Enrollment: 28 (actual)
• Sponsor: University Hospital, Toulouse · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The instrument that will be used in the study is the Murcia monocular Adaptive Optics Visual simulator (AOVIS-I). The system provides an objective characterization of the optical quality of the patient's eye by application of wave-front sensing technology. The optical condition of every eye is represented by its wave aberration. This characterization overcomes the current description based only in refractive errors. This provides an accurate description of the optics of the eye based on the assessment of the whole set of ocular aberrations. The particular wave-front sensor is of a Hartmann-Shack type. One characteristics of this wave-front sensor is its high dynamic range allowing measuring highly aberrated eyes, such as patients with keratoconus.

Detailed description

The complete procedure in one patient takes less than 5 minutes and is completely non-invasive.

Conditions

• Keratoconus

Interventions

Type	Name	Description
DEVICE	classic aberrometer and aberrometer AOVIS-1	Measurement of aberrations in early stages (1 and 2) of keratoconus as compared aberrometer AOVIS-1 with a "classic aberrometer".
DEVICE	Aberrometer AOVIS-I	Measurement of aberrations in high stages (3 and 4) of keratoconus. Objective characterization of the optical quality of the patient eye by application of wave-front sensing technology in late stage keratoconus The complete procedure in one patient takes less than 5 minutes in only one consultation and is completely non invasive. The optical measurements only involve the use of low power infrared laser

Timeline

• Start date: 2011-10-01
• Primary completion: 2012-11-01
• Completion: 2012-11-01
• First posted: 2011-02-14
• Last updated: 2017-03-03

Locations

1 site across 1 country: France