Exploring the Psychophysics of Keratoconus Using the Moorfields Acuity Chart

Launched by MOORFIELDS EYE HOSPITAL NHS FOUNDATION TRUST · Apr 24, 2015

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Gender

ALL

Eligibility criteria

• Keratoconic subjects (50):
• • Age 18-40 years.
• • The presence of keratoconus in at least one eye.
• • The absence of significant media opacities (e.g. cataract, corneal scarring).
• • The absence of any other ocular pathology (e.g. glaucoma, diabetic retinopathy, uveitis).
• • The absence of amblyopia in the test eye.
• • No previous ocular surgery (e.g. corneal crosslinking, cataract surgery, etc.)
• • Best corrected visual acuity better than or equal to 6/60 (1.0 logMAR).
• • Pupil diameter ≥3 mm and ≤7 mm in normal room illumination.
• Healthy subjects (30):
• • Age 18-35 years.
• • The absence of clinically significant keratoconus.
• • The absence of significant media opacities. (e.g. cataract, corneal scarring).
• • The absence of any other ocular pathology (e.g. glaucoma, diabetic retinopathy, uveitis).
• • The absence of amblyopia in the test eye.
• • No previous ocular surgery (e.g. corneal crosslinking, cataract surgery, etc.)
• • Best corrected visual acuity better than or equal to 6/9 (0.1 logMAR).
• • Pupil diameter ≥3 mm and ≤7 mm in normal room illumination.