Objective and Subjective Evaluation of Ophthalmic Lenses With Extra Power

Inclusion criteria

• Subjective report of visual fatigue
• Non-presbyopes
• Permanent wearers who wear glasses for at least 5 hours a day
• Distance refractive error within the range of [+6.00 to -6.00]* (with cylinder in the negative form),
• Cylindrical component of the refractive error within the range of 0 to 2 D in both eyes,
• Anisometropia ≤ 1.00 D in sperical equivalent,
• Visual acuity of +0.10 logMAR or better in each eye with new prescription at distance (high contrast/high luminance),
• Distance visual acuity difference ≤0.20 logMAR between right and left eye (high contrast, high luminance)
• Near binocular visual acuity of +0.10 logMAR or better with a new prescription (high contrast, high luminance),
• Study frame characteristics: Frame B size at least 22 mm

Exclusion criteria

• Vulnerability of the subject,
• Participation in another study which might have an influence on vision or interfere with study assessments,
• Binocular vision problems,
• Known ocular pathology (e.g., age-related macular degeneration, glaucoma…),
• Any previous ocular surgery which might have an influence on vision or interfere with study assessments (e.g., iridectomy, refractive surgery…),
• Any untreated and/or uncontrolled systemic condition which might have an influence on vision, or interfere with study assessments (e.g., uncontrolled diabetes, uncontrolled high blood pressure…),
• Any medical treatment or medication that might have an influence on vision or interfere with study assessments (e.g., antidepressants, drugs with atropinic effects…),
• Knowledge/expertise in optometry, ophthalmic lenses, or optics based on past or current professional activity (e.g., optometrists, opticians, ophthalmologists…)