This study is designed to compare the relative performance related to subjective and objective vision between two multifocal soft contact lenses.
The aim of this study was to compare the subjective and objective vision. of Proclear® 1-D Multifocal test lenses (MF) with +0.75D overcorrection of the distance lens power in the nondominant eye compared to the Air Optix® Aqua Multifocal (CIBA VISION) contact lenses in low, Medium and High Add presbyopic subjects (+1.25 to +2.50 inclusive).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
49
Subjects were randomly assigned into either the omafilcon A/PC 1-D MF lenses with +0.75D over-correction in the non-dominant eye or the lotrafilcon B/Air Optix MF lenses then crossed-over into the alternative pair of study lenses.
Subjects were randomly assigned into either the omafilcon A/PC 1-D MF lenses with +0.75D over-correction in the non-dominant eye or the lotrafilcon B/Air Optix MF lenses then crossed-over into the alternative pair of study lenses
Clinical Optics Research Lab, Indiana University,
Bloomington, Indiana, United States
Objective Vision Assessments: High Contrast Distance Visual Acuity
Tested with charts distant to the subject with both eyes together in normal lighting conditions. The unit of measure is logMAR units (logarithm of the minimum angle of resolution) A logMAR acuity of 0.0 equates to 20/20 Snellen acuity. Positive logMAR values indicate poorer vision and negative values denote better visual acuity than baseline 20/20 value.
Time frame: After 1 hour of lens wear
Objective Vision Assessments: High Contrast Intermediate Visual Acuity
Tested with charts at intermediate distance (100cm)distant to the subject with both eyes together in normal lighting conditions. The unit of measure is logMAR units (logarithm of the minimum angle of resolution) A logMAR acuity of 0.0 equates to 20/20 Snellen acuity. Positive logMAR values indicate poorer vision and negative values denote better visual acuity than baseline 20/20 value.
Time frame: After 1 hour of lens wear
Objective Vision Assessments: High Contrast Near Visual Acuity
Tested with charts set at near point (40cm)distant to the subject with both eyes together in normal lighting conditions. The unit of measure is logMAR units (logarithm of the minimum angle of resolution) A logMAR acuity of 0.0 equates to 20/20 Snellen acuity. Positive logMAR values indicate poorer vision and negative values denote better visual acuity than baseline 20/20 value.
Time frame: After 1 hour of lens wear
Subjective Overall Vision: High Contrast Distance Visual Quality
Subjects instructed to rate Vision quality at distance, intermediate and near vision (OU) using a 0-100 numerical scale where 0 = poor and 100 = excellent.
Time frame: After 1 hour of lens wear
Subjective Vision Assessments: High Contrast Intermediate Visual Quality
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Subjects instructed to rate Vision quality at distance, intermediate and near vision (OU) using a 0-100 numerical scale where 0 = poor and 100 = excellent.
Time frame: After 1 hour of lens wear
Subjective Vision Assessments: High Contrast Near Visual Quality
Subjects instructed to rate Vision quality at distance, intermediate and near vision (OU) using a 0-100 numerical scale where 0 = poor and 100 = excellent.
Time frame: After 1 hour of lens wear