Toric Eye Strain and Stability Study

Inclusion Criteria:

1. The subject must have read, understand, and sign the statement of informed consent and
receive a fully executed copy of the Informed Consent Form.

2. The subject must appear able and willing to adhere to the instructions set forth in
this protocol.

3. The subject must be between 18 years and 45 years of age (inclusive).

4. The subject must have best-corrected Snellen visual acuity of 20/30 or better in each
eye.

5. 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.

6. 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.

7. 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.

8. 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).

9. 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.

10. 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:

1. 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)

2. Any previous ocular or intra-ocular surgery (e.g. radial keratotomy, PRK, LASIK, etc.)

3. 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.

4. Any ocular infection

5. Current use of topical ophthalmic medications other than artificial tears/rewetting
drops.

6. History of binocular vision abnormality or strabismus.

7. Any infectious disease (e.g. hepatitis, tuberculosis) or a contagious
immunosuppressive disease (e.g. HIV) by self-report.

8. Other active ocular disease that in the opinion of the investigator would
contraindicate contact lens wear.

9. Employee of the investigational clinic (e.g. investigator, coordinator, technician)

10. Subject does not have a wearable pair of spectacles.