Toric Eye Strain and Stability Study

Inclusion Criteria

• The subject must have read, understand, and sign the statement of informed consent and receive a fully executed copy of the Informed Consent Form.
• The subject must appear able and willing to adhere to the instructions set forth in this protocol.
• The subject must be between 18 years and 45 years of age (inclusive).
• The subject must have best-corrected Snellen visual acuity of 20/30 or better in each eye.
• If the subject has ever worn contact lenses, the subject must be a current wearer of soft spherical contact lenses for at least 5 days/week and at least 8 hours/day during the month prior to enrollment.
• Subjective refraction must result in a vertex-corrected astigmatic contact lens prescription requiring at least -0.75 DC but not more than -1.75 DC cylindrical contact lens correction in each eye.
• Subjective refraction must result in a vertex-corrected spherical contact lens prescription between +0.25D to +4.00D or between-0.50D to -9.00D in each eye.
• The subject must not have the need for presbyopic correction (i.e., they must not be using as add in spectacles or wearing multifocal or monofocal contact lenses).
• The subject must have normal eyes with no evidence of abnormality or disease that in the opinion of the investigator would contraindicate contact lens wear.
• The subject must have access to the internet throughout the day (either desktop and/or smartphone) and be willing to answer a web-based survey within 1 hour of receiving a text message based notification throughout the day for up to 8 days, throughout the study duration.

Exclusion Criteria

• Self-reported current pregnancy or lactation or plans to become pregnant during the study period (subjects who report becoming pregnant during the study will be discontinued)
• Any previous ocular or intra-ocular surgery (e.g. radial keratotomy, PRK, LASIK, etc.)
• Any clinically meaningful slit lamp findings contraindicating contact lens wear (e.g. greater than or equal to grade 3 finding of edema, corneal neovascularization, corneal staining, conjunctival injection, blepharitis/meibomian gland dysfunction) on the FDA classification scale or any other ocular abnormality that in the opinion of the investigator may contraindicate contact lens wear.
• Any ocular infection
• Current use of topical ophthalmic medications other than artificial tears/rewetting drops.
• History of binocular vision abnormality or strabismus.
• Any infectious disease (e.g. hepatitis, tuberculosis) or a contagious immunosuppressive disease (e.g. HIV) by self-report.
• Other active ocular disease that in the opinion of the investigator would contraindicate contact lens wear.
• Employee of the investigational clinic (e.g. investigator, coordinator, technician)
• Subject does not have a wearable pair of spectacles.