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.
The complete procedure in one patient takes less than 5 minutes and is completely non-invasive.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
28
Measurement of aberrations in early stages (1 and 2) of keratoconus as compared aberrometer AOVIS-1 with a "classic aberrometer".
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
University Hopstial Toulouse
Toulouse, France
The primary outcome of the study is to evaluate the AOVIS-I and its wave-front sensor with high dynamic range for measuring high-order aberrations in patients with late stages (3 and 4) of keratoconus
Time frame: at the 1st day
To evaluate the reliability of the measures in early stages (1 and 2) of keratoconus as compared with a "classic aberrometer".
Time frame: at the 1st day
To describe the measures obtained in advanced stages (3 and 4) of keratoconus.
Time frame: at the 1st day
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