Visual Outcomes for Toric Efficacy Study

Visual Outcomes for Toric Efficacy Study

This is a crossover study of two types of contact lenses (toric orthokeratology and soft multifocals). Primary aims are to quantify correction of astigmatism, subjective and objective visual performance, aberrometry, peripheral refraction and bacterial bioburden between toric orthokeratology and soft toric multifocal contact lenses.

Inclusion Criteria:

• 18 to 39 years of age (inclusive)
• Able to read and understand the study informed consent
• Plano to -5.00 D (inclusive) vertex corrected sphere power in each eye
• 1.25 to -3.50 D (inclusive) vertex corrected astigmatism in each eye
• Best corrected acuity of 20/25 or better in each eye
• No history of ocular pathology or surgery
• No significant binocular vision or accommodation abnormality (i.e. strabismus, amblyopia)
• No gas permeable lens wear for at least 1 month
• No systemic or ocular contraindications for contact lens wear
• Not pregnant/lactating (by self-report)

Exclusion Criteria:

• Adults unable to consent
• Individuals who are not yet adults (infants, children, teenagers)
• Prisoners
• Students for whom one of the principal investigators have direct access to/influence on grades would be consented and seen by another investigator for all visits.
• Pregnant/lactating women (by self-report)