Study: NCT03367793

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Spectacles - Metric Technique #1 Derived
Description: Prescription spectacle lenses determined by metric-derived objective technique #1. For this method, wavefront error will be measured with the COAS (complete ophthalmic analysis system) wavefront aberrometer post-dilation with the goal of obtaining 3 to 5 high quality captures per eye. Wavefront measures will be re-sized to the patient's habitual pupil diameter and averaged. Post-measurement analysis will then be performed using a computer algorithm to identify the refractive correction predicted to produce the best image quality, as measured by maximization of the image quality metric Visual Strehl ratio in the spatial domain (VSX). The refractive correction determined from this analysis will be produced in prescription spectacle lenses and dispensed to the patient as the Intervention: Spectacles - Metric Technique #1 Derived.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Spectacles - Metric Technique #1 Derived
Description: Prescription spectacle lenses determined by metric-derived objective technique #1. For this method, wavefront error will be measured with the COAS (complete ophthalmic analysis system) wavefront aberrometer post-dilation with the goal of obtaining 3 to 5 high quality captures per eye. Wavefront measures will be re-sized to the patient's habitual pupil diameter and averaged. Post-measurement analysis will then be performed using a computer algorithm to identify the refractive correction predicted to produce the best image quality, as measured by maximization of the image quality metric Visual Strehl ratio in the spatial domain (VSX). The refractive correction determined from this analysis will be produced in prescription spectacle lenses and dispensed to the patient as the Intervention: Spectacles - Metric Technique #1 Derived.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Spectacles - Metric Technique #1 Derived
Description: Prescription spectacle lenses determined by metric-derived objective technique #1. For this method, wavefront error will be measured with the COAS (complete ophthalmic analysis system) wavefront aberrometer post-dilation with the goal of obtaining 3 to 5 high quality captures per eye. Wavefront measures will be re-sized to the patient's habitual pupil diameter and averaged. Post-measurement analysis will then be performed using a computer algorithm to identify the refractive correction predicted to produce the best image quality, as measured by maximization of the image quality metric Visual Strehl ratio in the spatial domain (VSX). The refractive correction determined from this analysis will be produced in prescription spectacle lenses and dispensed to the patient as the Intervention: Spectacles - Metric Technique #1 Derived.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Spectacles - Metric Technique #2 Derived
Description: Prescription spectacle lenses determined by metric-derived objective technique #2. For this method, wavefront error will be measured with the COAS (complete ophthalmic analysis system) wavefront aberrometer post-dilation with the goal of obtaining 3 to 5 high quality captures per eye. Wavefront measures will be re-sized to the patient's habitual pupil diameter and averaged. Post-measurement analysis will then be performed using a computer algorithm to identify the refractive correction predicted to produce the best image quality, as measured by maximization of the image quality metric Pupil Fraction tessellated (PFSt). The refractive correction determined from this analysis will be produced in prescription spectacle lenses and dispensed to the patient as the Intervention: Spectacles - Metric Technique #2 Derived.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Spectacles - Metric Technique #2 Derived
Description: Prescription spectacle lenses determined by metric-derived objective technique #2. For this method, wavefront error will be measured with the COAS (complete ophthalmic analysis system) wavefront aberrometer post-dilation with the goal of obtaining 3 to 5 high quality captures per eye. Wavefront measures will be re-sized to the patient's habitual pupil diameter and averaged. Post-measurement analysis will then be performed using a computer algorithm to identify the refractive correction predicted to produce the best image quality, as measured by maximization of the image quality metric Pupil Fraction tessellated (PFSt). The refractive correction determined from this analysis will be produced in prescription spectacle lenses and dispensed to the patient as the Intervention: Spectacles - Metric Technique #2 Derived.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Spectacles - Metric Technique #2 Derived
Description: Prescription spectacle lenses determined by metric-derived objective technique #2. For this method, wavefront error will be measured with the COAS (complete ophthalmic analysis system) wavefront aberrometer post-dilation with the goal of obtaining 3 to 5 high quality captures per eye. Wavefront measures will be re-sized to the patient's habitual pupil diameter and averaged. Post-measurement analysis will then be performed using a computer algorithm to identify the refractive correction predicted to produce the best image quality, as measured by maximization of the image quality metric Pupil Fraction tessellated (PFSt). The refractive correction determined from this analysis will be produced in prescription spectacle lenses and dispensed to the patient as the Intervention: Spectacles - Metric Technique #2 Derived.